Barrel: 13.7" 416R. Chambered in .308, with a 1:10 twist, and a Mid-length gas system. Barrel is finished off with a PSA 12.5" Quad Rail, and a JMAC GFHCE-R Pin/Weld muzzle device. Upper: Forged 7075-T6 A3 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 Lower: Sabre-10 lower with Black Magpul SL-L stock and grip. Black cerakote finish. Marked multi-caliber. Comes Standard with Springco Buffer Spring, Battle Arms Development Pivot