The Palmetto State Armory Custom Series 5.56 NATO Mid-Length 16" Nitride 15" Cross-Cut MLOK MOE gives you a tried and true platform with a PSA Custom Series MLOK compatible handguard and a custom finish that is sure to draw attention. CUSTOM PAINTED ITEMS FROM PSA CUSTOM MAY HAVE BLEMISHES AND/OR DIFFERENCES FROM PICTURE Barrel: 16" 4150V chrome moly vanadium steel, chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, mid-length gas system, and a lightweight pencil profile. The barrel is nitride coated and finished off with a 0.625" diameter low profile gas block, Palmetto State Armory Custom 15" Cross-Cut rail and a birdcage style A2 flash hider. Upper: Billet 7075-T6 AR upper is Teflon-Coated for durability. These upper receivers are made for us right here in the USA. Bolt Carrier Group: Nitride treated 8620 steel bolt, with an enhanced firing pin and external 5.56 style extractor. The bolt carrier group is compatible with most aftermarket fire control groups. Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for the caliber. The finish is Teflon-coated. The Mil-spec diameter 7075-T6 buffer tube is hard-coat anodized with 6 adjustment positions and is fitted with a MOE Carbine Stock, Magpul grip, and PSA Custom 3.5 lb FLAT Bow FCG. The PSA Custom Series gives unmatched quality and in-house customization at prices that other manufacturers can't compete with proving you don't have to pay top-dollar for top-shelf quality!!