Barrel: Chrome-moly vanadium steel barrel chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a pistol-length gas system. The nitrided barrel is finished off with a 4 knurled tube free-float handguard, R-marked front sight gas block, and an A2 flash hider. Upper: Forged 7075-T6 C7 AR upper is machined to MIL-SPECS and hard coat anodized. Uppers include forward assist, dust cover, and A1 rear sight appature. Bolt Carrier Group: Shot-peened, mil-spec Carpenter 158 steel bolt. Gas Key Hardened to USGI Specifications, fastened with Grade 8 screws, and Staked Per Mil-Spec. Carrier is 8620 steel M-16 full auto profile and is chrome lined and phosphate coated.