The Faxon Firearms Duty Series AR15 Barrel 5.56NATO 1:8 Twist 4150 Nitride - 14.5" | Pencil Profile | Mid Length | Integrated Slim Flash Hider offers outstanding value and precision, manufactured 100% in-house from cradle to grave, fully stress relieved, air-gauge tested, and 11-degree target crowned to deliver superior accuracy. Built with 4150 CMV steel and finished in Nitride, this Button Rifled barrel balances durability with clean, reliable performance for hard-use rifles. The 14.5" barrel length provides a versatile mid-length gas system and a slim pencil profile that keeps weight down while maintaining stiffness for consistent shot-to-shot results, and the integrated Slim 3-Port Muzzle Brake reduces flash and recoil without adding bulky components. Features include a 1:8 twist compatible with a broad 5.56 NATO ammunition spectrum, a 1/2-28 muzzle thread, and a .625" gas block journal length, all complemented by an M4-style barrel extension. Each barrel is stress-tested, headspace checked with precision gauges, and finished in Nitride for corrosion resistance, ensuring dependable accuracy and rugged field performance across duty, target, and sporting applications.