The Faxon Firearms A0A863P12NGQ Big Gunner Duty 8.6 Blackout 12" Target Crown Black Oxide 4150 Steel Barrel is crafted for AR10 platforms that demand precision and reliability. Built in a 12" length with a pistol-length gas system, this Duty Series barrel delivers balanced recoil management and steady handfeel for rapid follow-up shots, making it an excellent choice for dynamic field use or tactical training. The 8.6mm Blackout chamber paired with high-grade 4150 steel and a Black Oxide finish provides rugged durability, corrosion resistance, and consistent accuracy in challenging conditions. Its Target Crown carefully aerates the muzzle for improved consistency and a clean, predictable break, while the Nitride finish enhances hardness and longevity without sacrificing smooth bore performance. Designed for seamless compatibility with AR10 builds, this barrel is ready to drop into existing rifles without extensive fitting, delivering enhanced velocity and energy for short to mid-range engagements. Whether youre dialing in precision for competition, varmint control, or personal defense, the Faxon Firearms Big Gunner Duty barrel offers dependable performance, repeatable results, and the confidence to push your AR10 platform to its full potential.