<p><strong>Barrel</strong>: Chrome-moly vanadium steel, phosphate-coated, chrome-lined barrel chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a carbine-length gas system.  The tapered profile barrel is finished off with a PSA 9" Guardsman Hex Full Picatinny M-Lok free-float rail, pinned low-profile gas block, and 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. Featuring a mil-spec finish, 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, HPT, mil-spec Carpenter 158 steel bolt. Sprinco gas rings. Gas Key Hardened to USGI Specifications, Fastened with OCKS screws, and Staked Per Mil-Spec. The carrier is an 8620 steel M-16 full-auto profile. Phosphate-coated and chrome-lined.</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 Magpul MOE PR stock. The rifle is finished off with a Magpul MOE Grip, PSA "Guardsman" Flat Bow Single Stage trigger, and Ambi Safety.</p> <p data-start="211" data-end="472"><strong>*This firearm is classified as a Short Barreled Rifle (SBR) under the National Firearms Act (NFA) and is subject to all NFA regulations. Buyer must be at least 21 years old and must reside in a state where SBR ownership is legal. All NFA rules apply.</strong><br /><strong>By purchasing this item, you acknowledge and agree that you are legally eligible to own an NFA item and will comply with all federal, state, and local laws.* </strong></p>