<p><strong>Barrel</strong>: Chrome-moly vanadium steel barrel chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a mid-length gas system.  The A2 profile barrel is finished off with a PSA 15" Lightweight Hex Full Picatinny M-Lok free-float rail, low-profile gas block, 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 Carrier Group</strong>: Full-auto profile 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. The carrier is an 8620 steel M-16 full-auto profile.</p> <p><strong>Lower</strong>: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for the caliber. The finish is hard-coat anodized. The Mil-spec diameter 7075-T6 buffer tube is hard-coat anodized has 6 adjustment positions, and is fitted with a PSA Classic Carbine Stock and then the rifle is finished off with a PSA Classic A2 grip, and standard Mil-Spec AR-15 Fire Control Group.</p>