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  • Post category:Barrels
  • Post last modified:April 6, 2024
  • Post published:December 13, 2022

Are you a shooter looking for the best 300 blackout barrel? If so, you have come to the right place. In this blog post, we will be covering one of the most popular topics in shooting – finding and selecting the perfect 300 Blackout Barrel. We understand that there is a lot to consider when choosing your muzzle device, so we are here to break it down for you. We will start by discussing what makes 300 Blackout different from other cartridges available, then we’ll talk about why 300 AAC blackout is becoming increasingly popular with shooters and finally discuss which barrels are best suited for use with this round. 😎🔥

Best 300 Blackout Barrel

What is 300 Blackout Barrel? 🤔

This term is used to describe a barrel that is chambered in the 300 AAC Blackout cartridge. This round has quickly gained popularity among shooters due to its ability to effectively shoot both supersonic and subsonic ammunition without the need for a suppressor. Additionally, 300 blackout barrels are capable of reliably cycling both types of ammo, making it an ideal choice for those who want to be able to shoot suppressed and unsuppressed rounds without having to switch barrels.

Our Top Pick
Brigade Manufacturing .300 Blackout AR Barrel
Crafted by Brigade Manufacturing, this firearm stands as a testament to their unwavering dedication to excellence. Measuring a compact 7.5 inches in length, it achieves the ideal equilibrium between maneuverability and precision.
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Features 🔥

It is one of the most popular barrels available for building an AR-15 rifle. It provides shooters with the opportunity to shoot both supersonic and subsonic rounds without needing to switch out their barrels, while also boasting outstanding accuracy and reliability.

Here are some great features of a 300 Blackout Barrel:

✔️ Durability: the barrel is constructed with high-grade 4150 Chrome Moly Vanadium steel, making it strong and reliable enough to handle tough environmental conditions and hard use. Additionally, the barrel features a Melonite finish which increases corrosion resistance as well as durability.

✔️ Versatility: it offers shooters unparalleled versatility when it comes to ammunition selection. The barrel can fire both supersonic and subsonic rounds with ease, meaning that switching between loads is no longer a hassle or a time-consuming process. Best of all, this barrel provides superb accuracy at ranges from CQB distances up to 200 yards or more.

✔️ Accuracy: it is designed for maximum accuracy by utilizing twist rates typically found on .223 Wylde chambered barrels, such as 1 in 8 or 1 in 7. This means that the barrel is capable of stabilizing heavier projectiles that can reach speeds up to 2200 fps while still providing tight groupings at longer distances!

✔️ Compatibility: it fits onto any standard AR-15 upper receiver, allowing you to build your own custom rifle without having to worry about compatibility issues or special tools being required. Best of all, this barrel can work with most aftermarket handguards, muzzle devices, and other accessories so you can fully customize your rifle according to your needs and preferences.

✔️ Reliability: Thanks to its robust construction, a 300 Blackout Barrel will last you many years without needing repair or replacement if maintained properly. This makes it ideal for extended shooting sessions or competitions where reliability is essential for success!

Our Top Pick
Rainier Arms AR Ultramatch 300BLK Barrel
Crafted with an unwavering focus on precision, this barrel boasts a 16-inch length and a 1:7.5 twist rate, guaranteeing exceptional accuracy with every shot. Whether you're honing your skills at the range or out in the field, you can rely on its consistent and reliable performance.
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Benefits 😎

This type of barrel is a popular choice among shooters for its versatility and simple setup. It offers shooters the ability to quickly switch between multiple calibers, allowing them to use different ammunition for different types of shooting. It also offers increased accuracy and less recoil than traditional rifle barrels. Additionally, the 300 blackout barrel is affordable and easy to install, making it an ideal choice for anyone looking to upgrade their rifle setup on a budget.

Here are the advantages of this item:

🚩 One of the major strong sides is its compatibility with both supersonic and subsonic ammunition. This means that shooters can use both types of ammunition without having to swap out barrels or modify their firearms in any way. This makes shooting more convenient and enjoyable as you won’t have to worry about constantly switching out accessories depending on which type of ammo you plan to use.

🚩 Another key point is that it can help reduce the sound signature when firing a round. The subsonic ammo used in this type of round travels slower than supersonic rounds, which helps reduce the noise produced by an otherwise loud gunshot. This makes it great for hunting where loud noises could spook game or target practice in urban settings where loud noises could disturb neighbors or other people nearby.

🚩 Finally, one of the biggest benefits is its enhanced accuracy at short ranges compared to other rifle cartridges such as .308 Winchester or .223 Remington. Due to their small size and relatively low velocity, bullets from these rounds tend to slow down quickly over distance, making them less effective outside close-range combat scenarios. The 300 blackout round, however, maintains more consistent velocities over longer distances resulting in better accuracy up close and further away if necessary.

Our Top Pick
Diamondback Barrels .300 BLK AR-15 Nitride Barrel
Precision-crafted within our own facilities using cutting-edge CNC machines, each piece undergoes a thorough inspection to guarantee the highest quality standards. With 5R rifling and a 1:8 twist rate, it ensures unwavering accuracy, ensuring that every shot you take hits the mark.
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Factors to Consider When Choosing a 300 Blackout Barrel 🔎

When diving into the world of the 300 Blackout, there are several factors to consider to ensure optimal performance and satisfaction. One of the primary considerations is the length of the component. While shorter lengths can be more maneuverable and are often preferred for close-quarters scenarios, they might not provide the best velocity or range. On the other hand, longer options can enhance bullet velocity and accuracy over distance but might be cumbersome in tight spaces.

🚩 The twist rate is another crucial aspect. It refers to how many times the bullet spins in one complete revolution. A faster twist rate, like 1:7, can stabilize heavier bullets, making them more accurate. Conversely, a slower twist rate, such as 1:8 or 1:9, might be better suited for lighter bullets. It’s essential to match the twist rate with the type of ammunition you plan to use most frequently.

🚩 Material and construction quality can’t be overlooked. High-quality materials, like stainless steel or chrome-moly, ensure durability and longevity. The method of rifling, whether it’s button rifling or cut rifling, can also influence the accuracy and the overall lifespan of the component.

🚩 The type of finish on the component is not just about aesthetics. A good finish, like nitride or phosphate, can provide resistance to corrosion and wear, ensuring that the component remains in top condition even after extensive use.

🚩 Lastly, consider the gas system length, especially if you’re looking for specific performance characteristics. Pistol-length gas systems can be ideal for shorter setups, while rifle-length systems might be more appropriate for longer ones. The right choice here can influence the recoil, cycling rate, and overall shooting experience.

In conclusion, when selecting a component for a 300 Blackout, it’s essential to weigh factors like length, twist rate, material, finish, and gas system length. By carefully considering these elements, one can ensure a balanced and efficient shooting experience.

Best 300 Blackout Barrel Review

#1 Faxon Firearms – Ar-15 Barrels 300 Blackout Gunner Profile

Faxon Firearms - Ar-15 Barrels 300 Blackout Gunner Profile

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For serious shooters looking for the maximum in versatility and power, look no further than Faxon Firearms’ Ar-15 Barrels 300 Blackout Gunner Profile. This gunner profile hybrid fuses a Government profile at the rear with a Pencil profile at the front. By retaining weight to maximize heat resistance and reduce whip at the rear while saving weight up front this design provides superior performance and handling in any situation.

The .300 Blackout option gives you more power while being compatible with all normal AR15 components, allowing you to customize your firearm as never before. Included features are Mag particle inspection, individually checked for headspace, and fitted with an 11-degree target crown this barrel is constructed of the most durable quality parts to maintain accuracy and impressively efficient performance over extended use.

Being button rifled with a nitride finish providing corrosion resistance makes this barrel perfect for any shooter that demands premium quality from their firearm accessories.

Video review

  • Superior versatility and power.
  • Compatible with all AR15 components.
  • Mag particle inspection for quality construction.
  • 11-degree target crown for accuracy.
  • Nitride finish provides corrosion resistance.
  • More expensive than other barrel brands.
  • May require special components for 300 Blackout rifles.


#2 Wilson Combat – Ar-15 Sbr Tactical Barrel 300 Blackout

Wilson Combat - Ar-15 Sbr Tactical Barrel 300 Blackout

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Crafted from premium 416R stainless steel, it ensures durability and longevity that will stand the test of time. Its standard pistol-length gas system is compatible with a wide range of aftermarket parts, giving you the flexibility to customize your rifle to your heart’s content.

One of the standout features is the .750-inch gas journal, which readily accepts various gas blocks, making it a breeze to fine-tune your rifle’s performance. Whether you’re an experienced builder or just starting out, you’ll appreciate the ease of customization this barrel offers.

But the benefits don’t end there. It is optimized for use with suppressors and subsonic loads, providing a quieter shooting experience without sacrificing performance. The .300 Blackout chamber and M4-style feed ramps ensure smooth and reliable operation, even in close-quarter scenarios.

  • Superior accuracy and reliability.
  • 1-in-7” twist rate.
  • Parkerized finish.
  • Chambered in 300 Blackout.
  • Threaded muzzle for suppressors.
  • May not be as accurate as some users claim.
  • The finish may not be to everyone’s taste.


#3 Ballistic Advantage Modern Series .300 AR Rifle Barrel

Ballistic Advantage Modern Series .300 AR Rifle Barrel

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Boasts a 1:7 twist rate, ensuring pinpoint accuracy with every shot. Whether you’re hunting, competing, or honing your skills, it guarantees consistent, reliable performance.

Crafted from high-quality 4150 Chrome Moly Vanadium steel, it is built to withstand the toughest conditions. The QPQ corrosion-resistant finish adds extra protection, ensuring longevity and reliability even in harsh environments. Designed for .300 AAC Blackout, it provides a seamless transition for your AR platform. Switching to this caliber is a breeze, offering versatility and the power you need.

It strikes the perfect balance between toughness and weight. You’ll enjoy enhanced maneuverability without compromising on durability, making it an ideal choice for your rifle. Rest easy knowing that this product adheres to all federal, state, and local laws and regulations. It’s your responsibility to understand and follow the Domestic Restricted Product Policy.

  • 1:7 twist rate for pinpoint accuracy.
  • High-quality 4150 Chrome Moly Vanadium steel construction for durability.
  • QPQ corrosion-resistant finish for longevity in harsh conditions.
  • Seamless transition to .300 AAC Blackout for versatility.
  • Balanced toughness and weight for enhanced maneuverability.
  • Compliance with federal, state, and local laws and regulations.
  • Limited caliber compatibility (specifically designed for .300 AAC Blackout).
  • May require additional accessories or modifications for some AR platforms.


#4 CMMG, Inc .300 AAC Blackout Barrel

CMMG, Inc .300 AAC Blackout Barrel

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This barrel sub-assembly boasts a 16.1-inch length with a multi-role profile and a 1:7 twist rate. It’s engineered for maximum accuracy, allowing you to hit your target consistently, whether you’re at the range or out hunting.

Crafted from high-quality 4140 Chrome Moly steel and finished with a salt bath nitride treatment, it is built to withstand the rigors of shooting in various conditions. It’s corrosion-resistant inside and out, ensuring its longevity and reliability. Chambered in .300 AAC Blackout, it offers versatility. You can switch between supersonic and subsonic ammunition, making it ideal for different shooting scenarios.

It is designed for straightforward installation, so you can spend less time tinkering and more time shooting. Trusted by shooting enthusiasts, it has received rave reviews for its performance and accuracy. It’s the choice of those who demand the best from their AR-15.

  • 16.1-inch length with a 1:7 twist rate for maximum accuracy.
  • High-quality 4140 Chrome Moly steel construction for durability.
  • Salt bath nitride treatment for corrosion resistance.
  • Chambered in .300 AAC Blackout for versatility with supersonic and subsonic ammunition.
  • Straightforward installation for convenience.
  • Trusted by shooting enthusiasts and well-reviewed for performance and accuracy.
  • Limited caliber compatibility (specifically designed for .300 AAC Blackout).
  • May not include additional accessories or components needed for a complete build or upgrade.


#5 CMMG Barrel Sub-Assembly 300 Blackout

CMMG Barrel Sub-Assembly 300 Blackout

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Rest easy knowing that all barrel sub-assemblies come properly headspace, saving you time and ensuring hassle-free installation. You’ll have peace of mind knowing that your firearm is built to exacting standards.

With a 16.1-inch barrel length and a medium taper contour, it is all about precision. Achieve superior accuracy, whether you’re at the range or in the field. Your shots will hit the mark consistently. The carbine gas system length ensures reliable cycling, reducing recoil and keeping you on target. No matter your skill level, it enhances your shooting performance.

Choose from a bead-blasted stainless steel or a salt bath nitride finish. Both options offer corrosion resistance and durability, ensuring it withstands the test of time. Chambered in .300 Blackout, it accommodates a wide range of ammunition types, making it suitable for various shooting applications.

  • Assembly 300 Blackout- Chambered in .300 Blackout for maximum firepower.
  • Features a 16.1” barrel length and medium taper contour.
  • Carbine gas system length helps to optimize performance.
  • 5/8-24 threads help give a secure fit.
  • 1-7 twist ensures optimal spin rate stability.
  • Rugged finish is available in both bead-blasted stainless steel or nitride salt bath.
  • May be too short for some applications.
  • The twist rate may not be suitable for all ammo types.


#6 ODIN Works Blackout Barrel

ODIN Works Blackout Barrel

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It is button-rifled for exceptional accuracy. Whether you’re hitting the range or heading out on a hunt, you can trust this barrel to deliver pinpoint accuracy and consistent performance.

Features a tunable gas block, allowing you to fine-tune your rifle’s performance. Achieve the perfect balance of gas flow for smoother cycling and reduced recoil. The result? Faster follow-up shots and improved overall control.

Crafted from high-quality stainless steel, it not only delivers on performance but also boasts exceptional durability. It resists corrosion, ensuring it stands up to the rigors of any environment. Designed with a pistol gas placement, it optimizes cycling for reliability and smooth operation. Whether you’re a competitive shooter or a weekend warrior, you’ll appreciate the consistent performance it offers.

It is easy to install, making it an ideal choice for both experienced gunsmiths and those new to firearm customization. Upgrade your AR-15 with confidence and enjoy the benefits of enhanced accuracy and control.

  • Manufactured from high-quality 416R stainless steel.
  • Medium profile barrel for superior accuracy.
  • 8 twist button rifling for accurate shooting at extended ranges.
  • .300 AAC Blackout cartridge provides more power with less recoil.
  • M4 feed ramps and 5/8-24 threading for optimized performance.
  • Tunable gas block to compensate for different loads and power levels.
  • Some users have reported poor accuracy with this barrel.
  • It may be too powerful for some shooters.


#7 TRYBE Defense Government Profile .300 Blackout Barrel

TRYBE Defense Government Profile .300 Blackout Barrel

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Designed to provide pinpoint accuracy. With a 1 in 8″ twist rate, you can expect consistent and precise shot placement every time you pull the trigger. Whether you’re hitting the range or on a hunt, it ensures you stay on target.

It is milled from 4150 Chrome Moly Vanadium Steel, known for its durability and longevity. It’s finished in black nitride, adding an extra layer of protection against corrosion and wear. This means your barrel will withstand the test of time, even in harsh conditions.

Featuring a carbine-length gas system, it offers reliable cycling and ensures your rifle functions smoothly. It’s the perfect choice for those seeking a balance of power and control. Whether you’re a seasoned gunsmith or a newcomer to firearm customization, installing it is a breeze. Get your rifle ready for action without any hassle.

  • Durable construction.
  • Precise manufacturing.
  • Accurate shooting.
  • 70 individual tests for unparalleled performance.
  • Air gauging process after rifling.
  • Not available everywhere.
  • May not be compatible with all rifles.


#8 Rosco Manufacturing Bloodline .300 AAC Blackout Barrel

Rosco Manufacturing Bloodline .300 AAC Blackout Barrel

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Whether you’re using subsonic or supersonic ammo, it is suppressor-friendly. Engineered with input from SOCOM end users and original creators of the caliber, it’s designed to deliver exceptional performance when paired with a suppressor. Say goodbye to excessive noise and hello to pinpoint accuracy.

At 8.2 inches, it strikes the perfect balance between compactness and ballistic performance. It’s ideal for SBR and pistol setups, giving you the flexibility of a shorter Personal Defense Weapon (PDW) without compromising on ballistics or accuracy. Crafted from 4150 Chrome Moly Vanadium material and finished with nitride coating, it is built to last. It can handle the rigors of regular use and is resistant to corrosion, ensuring you enjoy longevity and durability.

Rosco Manufacturing leaves nothing to chance. Twist rates, gas port diameters, and lengths have all been meticulously calculated to ensure optimal performance. Whether you’re shooting supers or subs, suppressed or unsuppressed, it will consistently meet your expectations. Whether you’re a seasoned shooter or a novice, installing it is a breeze. It seamlessly fits into your AR platform, allowing you to spend less time on installation and more time on the range.

  • Suppressor-friendly design for reduced noise and improved accuracy.
  • Compact 8.2-inch length ideal for SBR and pistol setups.
  • High-quality 4150 Chrome Moly Vanadium construction for durability.
  • Nitride coating for corrosion resistance.
  • Meticulously calculated twist rates and gas port diameters for optimal performance.
  • Versatile compatibility with different ammo types and suppressors.
  • Seamless installation for AR platform users.
  • Limited caliber compatibility (specifically designed for a specific caliber).
  • May require additional accessories or modifications for specific AR setups.


#9 Jacob Grey Firearms .300 Blackout Threaded AR Barrel

Jacob Grey Firearms .300 Blackout Threaded AR Barrel

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The .300 Blackout cartridge has taken the shooting world by storm, and for good reason. With it, you’ll have an AR-15 that excels in close-quarters combat while also delivering impressive long-range capabilities. Whether you’re a seasoned shooter or new to the .300 Blackout, you’ll appreciate its versatility.

This cold hammer-forged barrel features a reliable carbine gas system, ensuring consistent and dependable performance. The design includes slightly more wall thickness, allowing for efficient heat dissipation and minimizing barrel whip. Crafted from 4150 Chrome Moly Vanadium alloy, it is not only easy to clean but also highly resistant to corrosion. You can count on its durability, even in challenging conditions. Plus, it adheres to industry-standard gas-block seats and muzzle threads, making it compatible with your existing accessories.

If you’re looking to upgrade your muzzle device, Jacob Grey offers a range of muzzle devices and compensators that pair perfectly with it. Choose the one that suits your needs and fine-tune your shooting experience. Whether you’re a DIY enthusiast or prefer professional gunsmithing, installing it is straightforward. It fits seamlessly with JG-15 Upper receivers or any Mil-Spec AR-15 upper receiver.

  • Heavy-duty CMV alloy construction.
  • QPQ Nitride finish for durability and accuracy.
  • M4 barrel profile with a pistol-length gas system.
  • .750 inch diameter of gas block journal size.
  • 5/8×24 threads per inch.
  • 1 in 7 inches twist rate.
  • 4150 Chrome Moly Vanadium material construction.
  • The barrel profile may be too thin for some people’s liking.
  • The twist rate may be too slow for some customers.


#10 V Seven 300 AAC Blackout Stainless Match Barrel

V Seven 300 AAC Blackout Stainless Match Barrel

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Whether you’re an avid shooter or new to the world of firearms, the .300 AAC Blackout cartridge offers exceptional versatility. It is your gateway to experiencing the full range of capabilities this cartridge has to offer.

Engineered for excellence, it boasts a 5.5-inch length and a medium contour with a 1-7 twist rate, ensuring consistent and reliable performance. The 416R stainless steel construction guarantees durability and precision. Features a 5/8×24 thread pattern, allowing for easy attachment of muzzle devices and accessories. Its stainless steel pin-on low-pro gas block and stainless carbine gas tube ensure smooth and efficient operation.

V Seven stands behind the quality of its products, offering a lifetime warranty regardless of round count. You can trust in the longevity and reliability of this barrel for years to come.

  • Exceptional versatility with the .300 AAC Blackout cartridge.
  • 5.5-inch length and medium contour with a 1-7 twist rate for consistent performance.
  • 416R stainless steel construction for durability and precision.
  • 5/8×24 thread pattern for easy attachment of muzzle devices and accessories.
  • Stainless steel pin-on low-pro gas block and stainless carbine gas tube for smooth operation.
  • V Seven offers a lifetime warranty for peace of mind.
  • Potential cost consideration, as high-quality materials and features can be more expensive.
  • The Ionbond black finish may not dissipate heat as well as other finishes.


#11 Spikes Tactical 300 Blackout Medium Profile Rifle Barrel

Spikes Tactical 300 Blackout Medium Profile Rifle Barrel

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Designed for the discerning marksman, it is machined from a single piece of paravane blank, guaranteeing concentricity and uniformity. Every shot you take will hit the mark with unmatched precision.

With a 1/8 twist rate, it is tailored for .300 AAC Blackout cartridges, making it versatile for various shooting applications. Whether you’re hunting, competing, or practicing at the range, it can handle it all.

It is treated with Black Nitride both inside and out. This not only enhances corrosion resistance but also extends the lifespan of the barrel. You can trust that it will endure years of use. Featuring a medium profile, it strikes the perfect balance between weight and performance. It’s versatile enough for different shooting scenarios, ensuring you’re always prepared.

The 5/8×24 thread pitch for the muzzle allows for hassle-free attachment of muzzle devices, giving you the flexibility to customize your firearm to your liking. With a pistol-length gas system, you’ll experience reliable cycling and reduced recoil, making it easier to stay on target.

  • Superior strength and durability.
  • 1/8 twist rate for optimal accuracy.
  • 5/8 X 24 Thread Pitch.
  • .300 Black Out Chamber.
  • M4 NIB Coated Barrel Extension.
  • Double protection via Black Nitride inside and out.
  • May not be suitable for all firearms.
  • The thread pitch may not be compatible with all muzzle attachments.


#12 Aero Precision .300 Blackout CMV Barrel

Aero Precision .300 Blackout CMV Barrel

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Crafted with precision, it ensures pinpoint accuracy with every shot. Its 1-7 twist rate and 5/8×24 threaded muzzle allow you to maintain superior control over your shots, even during rapid fire.

Designed for versatility. Whether you’re using it for hunting, target shooting, or home defense, it is up to the task. Its pistol-length gas system guarantees reliable performance in various shooting scenarios.

Made from 4150 Chrome Moly Vanadium, it boasts impressive durability. It is finished with a QPQ corrosion-resistant coating, ensuring that it can withstand the harshest conditions while maintaining peak performance. The 5/8×24 thread pitch on the muzzle enables easy attachment of various muzzle devices, allowing you to personalize your firearm to your liking.

  • Pinpoint accuracy with 1-7 twist rate.
  • Versatile for hunting, target shooting, and home defense.
  • Reliable performance with the pistol-length gas system.
  • Impressive durability with 4150 Chrome Moly Vanadium.
  • QPQ corrosion-resistant coating for longevity.
  • Customizable with 5/8×24 threaded muzzle.
  • Suitable for rapid fire.
  • The potential need for additional investment in muzzle devices.
  • Barrel may be too basic for some shooters’ needs


#13 CBC Industries 300 AAC Blackout AR-15 Barrel

CBC Industries 300 AAC Blackout AR-15 Barrel

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Made to perfection, it ensures unrivaled precision and accuracy with every shot. With a 1-7 twist rate, it’s optimized to provide stability and control, whether you’re using supersonic or subsonic ammunition.

The CBC Industries 300 AAC Blackout AR-15 Barrel, with its Micro length of 5 inches, is designed for those seeking a compact and lightweight solution. It’s perfect for CQB (Close Quarters Battle) scenarios, making it a favorite among tactical shooters.

Made from 4150 Chrome Moly Vanadium and finished with Black Nitride coating, it not only guarantees impressive durability but also offers corrosion resistance. It’s built to withstand the rigors of intense shooting sessions. The barrel’s 5/8×24 thread pitch allows for easy attachment of various muzzle devices, giving you the flexibility to customize your firearm to your liking.

  • Unrivaled precision and accuracy.
  • 1-7 twist rate for stability with supersonic and subsonic ammo.
  • Compact and lightweight design (5-inch Micro length).
  • Ideal for CQB (Close Quarters Battle) scenarios.
  • Durable 4150 Chrome Moly Vanadium construction.
  • Corrosion-resistant Black Nitride coating.
  • 5/8×24 thread pitch for easy muzzle device attachment.
  • Customization options for personal preferences.
  • Micro length may limit long-range accuracy.
  • May require additional investment in muzzle devices for customization.


#14 Diamondback Barrels .300 BLK AR-15 Nitride Barrel

Diamondback Barrels .300 BLK AR-15 Nitride Barrel

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Crafted in-house using state-of-the-art CNC machines, it undergoes rigorous inspection to ensure top-notch quality. The 5R rifling and 1:8 twist rate guarantee consistent accuracy, making every shot count.

Designed with a pistol-length gas system, it is perfectly suited for .300 BLK ammunition, ensuring reliable cycling and reduced recoil. Whether you’re in a high-stress tactical situation or enjoying some leisurely shooting, it delivers. Machined from 4150 Chrome Moly Vanadium Steel, it is built to withstand the harshest conditions. Its heavy profile and salt bath Nitride finish provide an extra layer of protection against wear and corrosion.

Featuring 5/8×24 threading and an 11-degree target crown, it allows for easy customization. Add your choice of muzzle device or suppressor to fine-tune your shooting experience.

  • Precision CNC machining for top-notch quality.
  • 5R rifling and 1:8 twist rate for consistent accuracy.
  • Pistol-length gas system optimized for .300 BLK ammo.
  • Reliable cycling and reduced recoil.
  • Robust construction from 4150 Chrome Moly Vanadium Steel.
  • Salt bath Nitride finish for enhanced durability.
  • 5/8×24 threading and 11-degree target crown for customization.
  • Versatility for various shooting scenarios.
  • Heavy profile may affect overall firearm weight.
  • Customization options may require additional investment.


#15 Rainier Arms AR Ultramatch 300BLK Barrel

Rainier Arms AR Ultramatch 300BLK Barrel

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Designed with meticulous attention to detail, this barrel features a 16-inch length and a 1-7.5 twist rate, ensuring remarkable accuracy shot after shot. Whether you’re hitting targets at the range or in the field, you can trust in its consistent performance.

Made from high-quality stainless steel and finished in a sleek silver, it not only looks great but also withstands the rigors of heavy use. It’s designed to last, ensuring you get the most out of your investment. It is compatible with AR-15 platforms, offering a hassle-free installation process. It features a pistol-length gas system and a .750-inch gas block journal, making it adaptable for various setups.

Whether you prefer a polished or satin finish, it has you covered. Choose the one that suits your style and preferences. It also boasts 5/8×24 threading, allowing you to easily attach muzzle devices or suppressors to tailor your shooting experience.

  • Meticulous attention to detail for remarkable accuracy.
  • High-quality stainless steel construction for durability.
  • Sleek silver finish for aesthetics and heavy-use resistance.
  • Compatible with AR-15 platforms for easy installation.
  • Pistol-length gas system and .750-inch gas block journal for adaptability.
  • Choice of polished or satin finish to match preferences.
  • 5/8×24 threading for customization with muzzle devices.
  • Specific twist rates (1-7.5) may limit ammunition compatibility.
  • Customization options may require additional investment.


#16 Brigade Manufacturing .300 Blackout AR Barrel

Brigade Manufacturing .300 Blackout AR Barrel

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Made and manufactured by Brigade Manufacturing, it stands as a testament to their commitment to quality. With a length of 7.5 inches, it strikes the perfect balance between maneuverability and accuracy.

Chambered in .300 AAC Blackout, it delivers outstanding stopping power and accuracy. Whether you’re using it for hunting or home defense, it ensures reliable performance when it matters most.

Crafted from high-quality 4150 Chrome Moly Vanadium steel and finished in sleek black, it not only looks great but also withstands the rigors of heavy use. It’s designed for durability, so you can count on it for the long haul. It is compatible with MIL-SPEC AR uppers, making it a versatile choice for your AR-15 build. It features a pistol-length gas system, a .750-inch gas block journal, and 5/8×24 threads per inch for easy customization.

With a 1-8 twist rate, it ensures exceptional stability and accuracy with a wide range of bullet weights. Whether you prefer subsonic or supersonic ammunition, it performs admirably.

  • Manufactured by Brigade Manufacturing for quality assurance.
  • 7.5-inch length balances maneuverability and accuracy.
  • Chambered in .300 AAC Blackout for stopping power.
  • High-quality 4150 Chrome Moly Vanadium steel construction.
  • Sleek black finish for aesthetics and durability.
  • Compatible with MIL-SPEC AR uppers for versatility.
  • 1-8 twist rate for stability with various bullet weights.
  • Pistol-length gas system and 5/8×24 threads for customization.
  • May require additional investment for customization.
  • Specific twist rates (1-8) may have limitations with certain ammunition.
  • Heavier than other barrels.


Tips for Maintaining and Cleaning Your 300 Blackout Barrel 💧

Maintaining and cleaning your 300 Blackout is essential for ensuring its longevity and optimal performance. Regular maintenance not only preserves its condition but also guarantees accuracy and safety when firing.

✔️ One of the first things to remember is to always ensure your firearm is unloaded before starting any cleaning or maintenance. Safety should always be the top priority. Once you’re certain it’s safe, disassemble the firearm as per the manufacturer’s instructions. This will give you better access to the internal components, making the cleaning process more thorough.

✔️ Using a high-quality cleaning solvent is crucial. Apply the solvent to a bore brush and gently scrub the inside of the component. This will help in removing any fouling or residue that might have accumulated. After scrubbing, it’s a good idea to run a patch soaked in the solvent through it, followed by a dry patch to remove any excess. This process ensures that any contaminants, that can affect accuracy and potentially harm the component, are effectively removed.

✔️ Lubrication is another vital step in the maintenance process. After cleaning, apply a thin layer of quality gun oil to the internal and external surfaces. This not only protects against corrosion but also ensures smooth operation. However, avoid over-lubricating as it can attract dirt and debris, which can be counterproductive.

✔️ It’s also worth noting that while regular cleaning is essential, over-cleaning can be detrimental. Excessive scrubbing or using abrasive materials can wear down the rifling or damage the component’s finish. Therefore, it’s essential to find a balance and clean your 300 Blackout based on how frequently you use it and the conditions in which it’s used.

Regular and proper maintenance of your 300 Blackout ensures its longevity, accuracy, and safety. By using quality cleaning products, lubricating appropriately, and being mindful of over-cleaning, you can keep your firearm in top condition for years to come.


What are the key points while choosing 300 Blackout barrel?

There are several key points to consider:

☑️ The first is the type of barrel material you want. Most of them are made from either stainless steel or 4140 Chromoly steel. Stainless steel barrels are durable and resistant to rust and corrosion, while Chromoly steel barrels offer enhanced accuracy and better heat dissipation. Additionally, many shooters opt for fluted 300 blackout barrels which are designed to reduce weight and improve cooling properties for increased performance on extended shooting sessions.

☑️ Another factor to consider is its length. Longer barrels tend to be more accurate due to their increased sight radius while shorter barrels can help increase manoeuvrability and ease of use in tight spaces. Additionally, you may also want to look into twist rate options as 300 Blackout calibers typically perform best with 1:7 or 1:8 twist rates depending on your chosen ammunition type.

☑️ It’s also important to consider the muzzle device or flash suppressor option you’re looking for. Flash suppressors not only help reduce muzzle flash but can also help reduce felt recoil which is especially beneficial for heavier projectiles like those used in supersonic rounds of this caliber. On the other hand, some shooters may choose a muzzle brake over a flash suppressor as these devices provide significantly less recoil reduction but also require less cleaning after each shooting session due to their open design which helps blow debris away from the barrel’s crown.

☑️ Finally, it’s necessary to check what kind of coating options different manufacturers offer as this can significantly affect how long your barrel lasts before needing replacement. Many manufacturers offer nitride or Melonite coatings that provide excellent protection against wear and tear while still offering enhanced surface hardness for better performance on extended shooting sessions

What is the best barrel length for a suppressed 300 Blackout?

🔶 When building a 300 Blackout rifle intended to run suppressed, the ideal barrel length to balance performance factors is approximately 9 to 10 inches. This provides the best mix of ballistics, weight, maneuverability, and suppression for the 300 BLK cartridge.

🔶 Shorter barrels in the 7.5-9 inch range excel in tight spaces due to their compact size. However, the ability to fully stabilize and exploit heavier projectiles is limited. Velocity also suffers in shorter variants.

🔶 At around 10 inches, bullets have adequate dwell time to reach full expansion velocity even with a suppressor mounted. Subsonic loads also reliably cycle actions in the 10-inch range. Maneuverability in CQB environments remains excellent.

🔶 Longer barrels beyond 12 inches gain minimal velocity but the extra length and weight hampers handling indoors. Because 300 BLK was designed around shorter variants, a 10-inch tube maximizes the cartridge’s potential for both supersonic and subsonic loads in tactical applications.

🔶 For those seeking an easy-handling 300 Blackout host that is hearing-safe and extracts the most ballistic potential from the ground, a 9 to 10-inch barrel-suppressed platform strikes the ideal balance of capabilities. The length meshes perfectly with the caliber’s intended uses.

What was the 300 Blackout barrel designed for?

🔷 The 300 Blackout cartridge was designed from the outset to perform optimally in shorter 9 to 12-inch platforms on AR-15s. This differentiates it from legacy 5.56 rounds meant for longer lengths. Several key factors drove the development focused on short configurations.

🔷 The 300 BLK was intended to provide increased bullet energy and versatility compared to 5.56mm fired from compact weapons. Fitting a large magnum caliber round in a small AR package required a short friendly propellant.

🔷 The 300 BLK design allows full powder burn and consistent cycling in platforms under 10 inches with both supersonic and subsonic loads. This maximizes terminal ballistics while minimizing overall weapon size.

🔷 Short, suppressed platforms provide ideal use to enable quiet use in close quarters by special operations teams. The caliber was envisioned for integral suppression from the beginning.

🔷 By optimizing 300 BLK performance in half the length of 5.56, new capabilities were unlocked in familiar AR-15 size packages. The length focus was critical to matching the cartridge’s purpose.

What is the barrel life of a 300 Blackout?

✔️ The lifespan of a 300 Blackout largely depends on various factors, including the type of ammunition used, the rate of fire, and the maintenance practices of the shooter. Generally, when shooting supersonic ammunition, one can expect a longer lifespan compared to when shooting subsonic rounds, especially if those subsonic rounds are fired with a suppressor. The heat and pressure generated by supersonic rounds tend to be less erosive than the powder residue and carbon buildup associated with subsonic ammunition and suppressor use.

✔️ Typically, with moderate shooting and proper maintenance, one can anticipate a lifespan of around 5,000 to 10,000 rounds before noticing a significant degradation in accuracy. However, it’s worth noting that this is a general estimate, and actual experiences can vary. Some shooters might find their equipment last longer, especially if they’re meticulous about cleaning and not frequently shooting in rapid succession, which can accelerate wear due to heat.

✔️ While the 300 Blackout can offer a decent lifespan, its longevity is influenced by the shooting conditions and care provided. Regular cleaning and mindful shooting practices can help in prolonging the life of the equipment.

What is the most accurate 300 Blackout barrel?

🔶 The accuracy of a 300 Blackout largely hinges on the quality of its construction and the precision of its manufacturing. While many manufacturers claim to produce the most accurate equipment for this caliber, the truth is that accuracy can be subjective and varies based on individual experiences and specific use cases.

🔶 High-end manufacturers often employ premium materials and tighter manufacturing tolerances, which can lead to enhanced accuracy. Brands like Noveske, Daniel Defense, and Wilson Combat, among others, have garnered reputations for producing top-tier equipment for the 300 Blackout. These companies often use stainless steel or other high-quality materials, combined with advanced rifling techniques, to ensure consistent bullet spin and trajectory.

🔶 However, it’s essential to understand that the shooter’s skill, the quality of the ammunition, and the overall firearm setup play significant roles in achieving optimal accuracy. Even the best barrel can underperform if paired with subpar ammunition or if used by an inexperienced shooter.

🔶 In essence, while certain manufacturers are renowned for their precision engineering and high-quality products, the most accurate setup for the 300 Blackout will often be a combination of a quality barrel, the right ammunition, and a skilled shooter.

Conclusion 🙂

In the quest for the ideal 300 Blackout barrel, shooters are presented with a myriad of options, each with its unique features and benefits. From the durability of the Brigade Manufacturing .300 Blackout AR to the precision of the Rainier Arms AR Ultramatch 300BLK, there’s a variant tailored to every shooter’s needs.

Factors like length, twist rate, material, finish, and gas system length play a crucial role in determining the performance and satisfaction of the shooter. With the 300 Blackout gaining popularity for its versatility in shooting both supersonic and subsonic ammunition, it’s essential to make an informed choice. By weighing the various factors and understanding the benefits of each barrel, shooters can ensure a balanced, efficient, and enjoyable shooting experience. 🙂

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6 months ago

After reading this, I’m leaning towards the Diamondback Barrels .300 BLK AR-15 Nitride Barrel. Has anyone had any issues with it in colder climates?

    6 months ago
    Reply to  SteakOnly

    It’s essential to bear a few general considerations in mind when utilizing any firearm in chilly temperatures.

    🚩Firstly, low temperatures can cause lubricants to thicken, potentially leading to a less responsive firearm action. To mitigate this, it’s crucial to employ a lubricant specifically formulated for cold weather applications.

    🚩 Secondly, cold weather can cause the metal to contract, potentially impacting the firearm’s accuracy. When shooting in cold climates, it’s advisable to recalibrate your firearm using cold-weather ammunition.

    🚩 Lastly, maintaining warm and dry hands can become challenging in cold weather, affecting your grip on the firearm. Wearing insulated gloves and ensuring dry hands are essential practices when shooting in these conditions.

      6 months ago

      Is the Diamondback Barrels .300 BLK AR-15 Nitride Barrel suitable for hunting applications?

        6 months ago
        Reply to  SteakGalaxy

        It can indeed be suitable for hunting applications, depending on various factors. The .300 Blackout cartridge, in general, is well-suited for hunting medium-sized game, such as deer and hogs, especially at shorter to moderate ranges. Whether it is a good fit for your hunting needs depends on several considerations.

        🔶 Firstly, the suitability for hunting hinges on your choice of ammunition. It’s crucial to select .300 Blackout hunting ammunition designed for ethical and effective hunting. The specific bullet type, weight, and ballistic performance of the ammunition should align with the game you plan to hunt and the distances at which you’ll be shooting.

        🔶 The effective range typically extends to about 200 yards, making it ideal for close to mid-range hunting scenarios. If your hunting style often involves longer shots at extended ranges, you may want to explore other calibers or barrel configurations that offer improved downrange performance.

        🔶 Another factor to consider is whether you plan to use a suppressor for hunting. 300BLK is known for its compatibility with suppressors, providing a quieter shooting experience and reducing recoil. If you prefer a suppressed rifle for hunting, ensure that your chosen variant can accommodate suppressor attachments.

        🔶 Lastly, it’s essential to be aware of any state or local regulations governing the use of specific calibers, bullet types, or barrel lengths for hunting in your area. Compliance with these regulations is vital to ensure that you stay within the legal boundaries of your hunting pursuits.

          6 months ago

          I’m curious about the Rainier Arms AR Ultramatch 300BLK Barrel’s 1:7.5 twist rate. How does it affect the bullet’s trajectory?

            6 months ago
            Reply to  DirtGame

            🔷 The Rainier Arms AR Ultramatch 300BLK Barrel with a 1:7.5 twist rate is designed to stabilize a wide range of bullet weights and lengths effectively. The twist rate is a critical factor that determines how many times the bullet rotates as it travels down the barrel’s bore before exiting. In this case, the “1:7.5” twist rate means that the bullet completes one full rotation every 7.5 inches of length.

            🔷 A 1:7.5 twist rate is relatively fast, and it is often chosen for the 300 Blackout cartridge to accommodate a broad spectrum of bullet weights. This twist rate is considered versatile because it can stabilize both lightweight and heavy bullets. However, it does have some specific implications for the bullet’s trajectory.

            🔷 For lighter, faster bullets, a fast twist rate like 1:7.5 can provide better stability, which translates into improved accuracy. The bullet is less likely to wobble or tumble in flight, resulting in a flatter trajectory and more consistent point of impact at different distances. This is particularly important for precision shooting or when using supersonic loads in the 300 Blackout cartridge.

            🔷 On the other hand, for heavier bullets, the faster twist rate may not be as critical, but it still helps with stabilization. A fast twist rate can prevent heavier bullets from destabilizing and tumbling in flight, especially at longer ranges. This ensures that they maintain their accuracy and effectiveness.

            🔷 The 1:7.5 twist rate is designed to provide excellent stability and accuracy for a broad range of bullet weights commonly used in the 300BLK cartridge. It is a versatile choice that allows shooters to use various bullet types and weights while still maintaining good overall trajectory and accuracy performance.

              6 months ago

              What makes the 300 Blackout different from other cartridges? I’m new to shooting and trying to understand.

                6 months ago
                Reply to  QueenRainbow

                ➡️ The 300 AAC Blackout, commonly referred to as the 300 Blackout or simply 300 BLK, is a unique and versatile cartridge designed for firearms. It was developed to address specific needs within the shooting community and offers several distinct features that set it apart from other cartridges.

                ➡️ One of the most significant differences is the adaptability. It was created with the intention of being compatible with existing AR-15 rifles and magazines, particularly those chambered in 5.56 NATO or .223 Remington. This interchangeability is possible due to the 300 Blackout’s similar case dimensions, allowing it to fit in standard AR-15 platforms without requiring significant modifications.

                ➡️ The cartridge comes in two primary loadings: subsonic and supersonic. This versatility is particularly valuable to shooters as it allows them to choose between subsonic loads for suppressed shooting or supersonic loads for longer-range and higher-velocity applications. This flexibility makes it a highly adaptable choice for various shooting scenarios, from hunting to home defense.

                ➡️ Another key aspect is its ballistic performance. It excels in short to medium-range engagements, making it suitable for tasks like hunting in dense woods or urban environments. The cartridge typically offers good accuracy and adequate energy retention at these distances.

                ➡️ Additionally, it is well-suited for suppressed firearms. Subsonic loads combined with a suppressor can make for exceptionally quiet shooting, which is useful for minimizing noise and maintaining situational awareness in tactical situations or for reducing noise pollution during recreational shooting.

                  6 months ago

                  Has anyone tried the Brigade Manufacturing .300 Blackout AR Barrel for long-range shooting? How did it perform?

                    6 months ago
                    Reply to  CrazyDream

                    🔶 The stainless steel construction and 1:7 twist rate seem well-suited for stabilizing heavy projectiles needed for long-distance shooting. Accuracy is reportedly excellent with most loads inside 100 yards. However, some users have experienced inconsistent performance past 300 yards.

                    🔶 The 16-inch length provides the optimal velocity from a 300 BLK while maintaining compact maneuverability. But the light contourUserProfile may hamper sustained precision at distance compared to heavier profile barrels. Some have seen group sizes open up rapidly during long strings of fire.

                    🔶 When paired with quality match-grade ammunition, several owners report solid hits out to 400-450 yards using the Brigade barrel. However, significant bullet drops and estimating wind drift make hits past 500 yards difficult.

                    🔶 Overall the Brigade barrel delivers on 300 BLK’s versatility with good CQB capability and stretching to mid-range when factors align. But calibers like 6.5 Grendel or Creedmoor may be better choices for pure long-range precision work. The 300 BLK’s sweet spot remains inside 400 yards.

                      6 months ago

                      I’ve been using the Rainier Arms AR Ultramatch 300BLK Barrel for a while now, and its accuracy is top-notch.

                        6 months ago

                        I recently purchased the Brigade Manufacturing .300 Blackout AR Barrel, and it’s been a game-changer for my shooting experience. Highly recommended!

                          6 months ago

                          Having tried the Diamondback Barrels .300 BLK AR-15 Nitride Barrel, I can vouch for its precision and durability.