The Faxon Firearms Duty Big Bore 450 Bushmaster is a robust and versatile firearm designed for AR-15 platforms featuring a 16-inch barrel with a carbine-length gas system. Weighing just 1.72 lbs this barrel offers the Big Gunner contour ensuring optimal performance and handling. Finished in sleek black it is chambered for the DZZ_450 Bushmaster cartridge providing powerful capabilities for various shooting applications. The barrel includes muzzle threads of 11/16-24 and a twist rate of 1-16 making it a reliable choice for enthusiasts seeking precision and durability.