Discover what your gun is capable of with TRYBE Defense .300 AAC Blackout AR-15 Rifle Barrels. Devastating Accuracy. Tactical Versatility. Precision-Crafted Performance. .300 AAC Blackout Barrels from TRYBE Defense are engineered for mission flexibility, whether you're building a suppressed CQB SBR, a general-purpose carbine, or a heavy-duty precision rifle. Precision machined from 4150 CMV steel, heat-treated to MIL-SPEC hardness, and finished with a black nitride surface treatment, each barrel delivers rugged durability, excellent heat tolerance, and superior corrosion resistance in all environments. Designed to accommodate the wide performance envelope of .300 BLK, these barrels feature button rifling and optimized twist rates to stabilize a broad range of bullet weights. All models are gas-operated, compatible with standard AR-15 upper receivers, and configured for reliable cycling across various ammunition types when paired with appropriate buffer systems and gas tuning. A quality aftermarket barrel is the single most important upgrade you can make to increase the accuracy, consistency, and overall performance of your firearm. Designed around the versatile .300 BLK chamber, these barrels deliver superior ballistic performance in both subsonic and supersonic loads, ensuring optimal function with or without a suppressor and maximizing the rifle’s potential in tactical, hunting, or home defense scenarios. All TRYBE Defense barrels undergo rigorous quality checks and are held to the highest of standards. Each batch of TRYBE Defense barrels is inspected nearly 70 times throughout the manufacturing process, to include 100% inspection of headspace to ensure compliance with SAAMI Specification. Each barrel is also air gauged after rifling and is held to .0002" concentricity of the bore. The TRYBE Defense AR-15 Barrel chambered in .300 Blackout is a professional-grade component designed to elevate the performance of any rifle it’s paired with. Invest in quality where it counts. Built for shooters who demand reliability and performance, it is the fusion of quality enhanced materials, rigorous tolerances, and mission-ready design.   If you like what you see, click on the links below to view a wide variety of our best-in-class offerings from TRYBE Defense, TRYBE Optics, and TRYBE Tactical. TRYBE has hard-core offerings ready to augment your favorite firearm or next custom build that offer superb performance, keeping in mind your hard-earned dollar. TRYBE Defense Gun Parts and Accessories, Gunsmithing Equipment, Personal Protective Equipment, Pistol Parts, Rifle Parts, and Triggers TRYBE Optics Binoculars, Night Vision, Rangefinders, Red Dot Sights, Riflescopes, and Weapon-Mounted Accessories TRYBE Tactical Apparel, Eyewear, Gun Cases, Hearing Protection, Holsters, Magazine Pouches, Plate Carriers, and Range Bags Specifications for TRYBE Defense AR-15 Barrel, .300 AAC Blackout: Manufacturer: TRYBE Defense Color: Black Finish: Nitride Fabric/Material: 4150 Chrome Moly Vanadium Caliber: .300 AAC Blackout Gas Block Journal Size-Diameter: .750 in Threads per Inch: 5/8x24 Barrel Material: 4150 Chrome Moly Vanadium Flutes: No Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Features of TRYBE Defense AR-15 Barrel, .300 AAC Blackout:Available Lengths: 10.5”, 16”, 16.25”Compatible with .300 AAC Blackout and 7.62x35mm AmmunitionMatch-grade concentricity and tight bore tolerances ensure minimal projectile yaw and improved ballistic efficiencyConstructed from 4150 CMV Steel, Offering Higher Tensile and Yield Strength Compared to 4140 or Stainless SteelReady to Accept Your Favorite 5/8X24 Muzzle DeviceM4 Feed Ramps for Reliable CyclingInterior and Exterior Black Nitride Surface Treatment to Achieve 60+ HRC Surface HardnessBarrel is Button-Rifled, Air-Gauged, and Headspaced to Match Grade TolerancesCompatible with All MIL-SPEC AR-15 Upper Receivers and Bolt Carrier Groups Chambered for .300 BLK.300 AAC BLK is Optimized for Shorter Gas Systems (Pistol or Carbine), Allowing More Complete Combustion and Energy Transfer10.5” Option Perfect for Tactical and Suppressed SBR Builds16” and 16.25” Options Perfect for Duty-Grade or Defensive Carbines, and Mid-Range Precision BuildsPrecision Machined in the USA Package Contents: TRYBE Defense AR-15 Barrel, .300 AAC Blackout TRYBE Warranty TRYBE™ products are made for performance and durability and are covered by a comprehensive warranty depending on the type of product. See full warranty information here This product is compatible with the following gun models: AR-15