The Faxon Firearms Duty Series 20'' 5.56 NATO Gunner Barrel offers an exceptional balance of durability and lightweight maneuverability. Designed with a unique Gunner profile this barrel blends the robust features of a Government profile with the weight-saving benefits of a Pencil profile making it ideal for extended shooting sessions and hunting expeditions. Engineered for precision the barrel is fully stress relieved and airgauge tested featuring an 11-degree target crown for superior accuracy. The button rifled construction along with a QPQ Black Nitride finish both inside and out ensures long-lasting performance and reliability. With a 1:8'' twist and a rifle-length gas system this barrel is expertly crafted for shooters seeking top-tier performance. Additional features include a 1.9 gas block journal M4 barrel extension and a 1228 thread making it a standout choice for serious enthusiasts.