PSA 10.5" 5.56 NATO 1/7 Phosphate 9" Lightweight Hex M-Lok Upper With BCG & CH

Barrel: 10.5" 4150V Chrome Moly Vanadium steel, phosphate coated and chambered in 5.56 NATO with a 1 in 7" twist. The carbine-length gas barrel is finished off with a PSA 9" Lightweight Hex Full Picatinny M-Lok Free Float Rail, a low-profile .750 gas block, and an A2 Flash Hider.Upper: 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.Bolt: 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.