<p><strong>Barrel</strong>: 7.5" 4150V Chrome Moly Vanadium steel, Nitride coated and chambered in 300AAC Blackout with a 1 in 7" twist. The pistol-length gas barrel is finished off with a PSA 6" FDE Lightweight Hex Full Picatinny M-Lok Free Float Rail, a 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. 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</strong>: The bolt is made of Mil-spec shot-peened Carpenter 158 steel. The gas key is secured with grade 8 fasteners and staked per mil-spec. </p> <p><strong>Build Kit:</strong> A high quality lower build kit with everything you need to assemble your AR-15 lower into a pistol. Pistol kit includes an FDE PSA HAR-15 pistol brace, mmilspec buffertube, PSA classic FDE A2 grip, USGI trigger guard, carbine buffer spring, and standard carbine buffer.</p>