Barrel: 20" 4150 CRMOV, Black Nitride. Chambered in 6.5 creedmoor, 1:8 twist, and a rifle-length gas system. Barrel is finished off with a 12.5"" Quad Rail, a Sabre Compensator, and Cerakote Finished. Upper: Forged 7075 AR upper is hard coat anodized black for durability. These uppers are T-Marked engraved. Bolt Carrier Group: Sabre AR-10 BCG with Sprinco Gas Rings, Sprinco Ejector Spring, Sprinco Extractor Spring, and OCK's Gas Key Fasteners