Barrel: 20" Faxon Match Grade 5R Rifling 4150 CRMOV, Black Nitride. Chambered in .308, with a 1:10 twist, and a Rifle-length gas system. Barrel is finished off with a 15" Sabre Lock-Up Rail, and a Sabre Compensator muzzle device. Upper: Forged 7075-T6 A3 AR upper is cerakote FDE for durability. These uppers are T-Marked engraved. Bolt Carrier Group: Sabre AR-10 BCG with Sprinco Gas Rings and OCK's Gas Key Fasteners Lower: Sabre-10 lower with Coyote B5 CPS stock and Coyote B5 grip. FDE cerakote finish. Marked multi-caliber. Comes Standard with PSA Buffer Spring, Sabre 2-Stage DLC Trigger, and Anti-Walk Pins.