<p><strong>Barrel</strong>: Chambered in 300AAC Blackout with a 1:8 twist rate, M4 barrel extension, and a pistol gas system this barrel features a phosphate finish for accuracy and durability. It is finished off with a PSA 6" Lightweight M-Lok rail, .750" diameter low profile gas block, and an A2 flash hider.</p> <p><strong>Upper</strong>: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer.</p> <p><strong>Bolt</strong><span>: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside.</span></p> <p><span><b>Lower</b><span>: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber.  This lower is completed with a MOE EPT lower parts kit and fitted with an SB Tactical SBA3 Adjustable Brace.</span></span></p>