<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. The barrel is finished off with a Flat Dark Earth PSA 6" Lightweight Hex Full Picatinny M-Lok Free Float Rail, .750 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</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.<br /><br /><strong>Lower</strong>: This stealth forged lower is quality made using 7075-T6 aluminum and is marked "MULTI" for caliber. The finish is hard coat anodized. Finished with an Flat Dark Earth A2 Classic Grip and H&R HAR-15 Adjustable Pistol Stabilizing Blade. The fire control group is a PSA mil-spec single stage.</p>