Luth-AR Government Barrel Features The Luth-AR Government barrel assembly is machined from 4150 steel a material chosen for its durability and ability to withstand the heat and pressure of repeated firing on an AR-15 platform. A 1-in-7 twist rate is optimized to stabilize a wide range of bullet weights in 5.56mm giving builders flexibility in ammunition choice from lighter varmint loads to heavier match projectiles. Button broaching is used to cut the rifling a process known for producing a smooth consistent bore that supports repeatable accuracy. The 11.5 inch barrel carries a 0.750 diameter gas block mount and a carbine-length barrel type fitting cleanly into a standard AR-15 build. This assembly ships with an F-marked front sight base already installed giving builders a correctly sized sight base without needing to source one separately. A 2-piece handguard is included as well simplifying the overall build by removing a step most builders would otherwise have to handle on their own. Threaded 1/2x28 the barrel accepts standard muzzle devices without further machining. Finished with the government profile s classic sleek look the Luth-AR Government barrel assembly is available for sale at GrabAGun for builders who want a durable traditional-profile barrel for their next AR-15 project. Luth-AR Government Barrel Specifications Manufacturer: Luth-AR Model: Government Caliber: 5.56mm Compatible Hosts: AR-15 Mount Type: M-LOK Barrel Type: Carbine Length Twist Rate: 1:7 RH Diameter: .750 Thread Pattern: 1/2x28 Barrel Description: Button Broached Barrel Length: 11.50 Available At: GrabAGun