PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride Lightweight M-LOK Classic SOB Pistol - 516447162

Barrel: 4150V chrome moly steel. Chambered in 5.56 NATO, with a 1:7 twist rate and a Carbine Length gas system. Barrel is Nitride treated for accuracy and durability.  A2 profile barrel is finished off with a PSA Lightweight 9" M-Lok free-float rail, .750" low-profile gas block, and A2 style flash hider.
Upper: 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.
Bolt: 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. 8620 steel M-16 profile carrier is chrome lined and phosphate coated.
Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber. Finish is hardcoat anodized. Pistol 7075-T6 buffer tube is hardcoat anodized and is fitted with a SB Tactical SOB Pistol Brace.