The Faxon Firearms Duty Series AR15 Barrel 5.56NATO 1:8 Twist 4150 Nitride - 14.5" | Gunner Profile | Mid Length delivers precision reliability for enthusiasts and professionals alike, pairing Faxons renowned Gunner profile with a durable Black Matte finish to optimize balance, heat management, and accuracy in mid-length gas systems. Built for 5.56x45mm NATO with a true AR compatibility, this 14.50-inch barrel features a 1:8 twist rate that stabilizes a wide range of standard and heavier 6277 grain projectiles, making it versatile for duty, competition, or sport shooting. The 4150 Nitride treatment enhances wear resistance and corrosion protection without sacrificing performance, while the threaded muzzle adds flexibility for common accessories and suppressor-ready setups. Designed to fit AR platforms with a reliable, straightforward installation, this barrel embraces a no-flare, all-business approach that emphasizes consistency, repeatability, and long-term durability in demanding environments. Whether youre configuring a trusted duty rifle, a reliable patrol carbine, or a high-performance build, the Faxon Duty Series AR15 Barrel helps you achieve predictable accuracy, clean bore performance, and extended service life with every shot.