FEATURES: Barrel: The Nitride treated 4150V chrome moly steel is chambered in 5.56, with a 1:7 twist rate, M4 barrel extension, and Carbine-length gas system. This barrel is finished off with a PSA 10" Sabre QD Rail burnt bronze cerakote, Rifle seed adjustable gas block, and a Sabre compensator. Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized for durability then Cerakoted with Moss Green Cerakote. These uppers are T-Marked engraved. Bolt Carrier Group: Father’s of Freedom BCG by Microbest with Sprinco Extractor Spring and Carpenter 158 MP Bolt.