<p><strong>Barrel:</strong> Chrome Moly steel. Chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a carbine-length gas system.  Barrel is  is finished off with a calssic FDE handguard,  F-Marked gas sight base, and A2 flash hider.</p> <p><strong>Upper:</strong> Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized.   Uppers include forward assist and dust cover.  These uppers are made for us right here in the USA by a mil-spec manufacturer.</p> <p><strong>Bolt:</strong> Full-auto profile bolt carrier group.  Shot-peened, mil-spec Carpenter No. 158® steel bolt.  Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. </p> <p><strong>Lower:</strong> These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber. Finish is hardcoat anodize. Finished with a KAK Industries Shockwave Blade and Buffer Tube.  The the fire control group is a PSA mil-spec finished, single-stage assembly.</p>