Barrel: Chrome Moly steel nitride coated barrel. Chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a carbine-length gas system. Barrel is finished off with a DPMS 10.5" Lightweight M-Lok rail, low-profile gas block, and A2 flash hider.Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer.Bolt: Full-auto profile bolt carrier group. Shot-peened, mil-spec Carpenter No. 158A(R) steel bolt. Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec.Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber. Finish is hard coat anodize. Finished with a retro A2 grip, CAR-15 Blade Pistol Stabilizing Brace, and 6 position 7075 buffer tube. The fire control group is a DPMS mil-spec single-stage assembly.