PSA 10.5" Carbine-Length 5.56 NATO 1/7 Nitride 9" Lightweight M-Lok Slick Side Upper With BCG & CH – 5165448560

Barrel: 10.5" Chrome Moly vanadium steel, melonite treated for durability and chambered in 5.56 NATO with a 1 in 7" twist rate. Carbine length gas barrel is finished off with a PSA 9" Lightweight M-Lok Rail, a low profile gas block and an A2 Flash hider.
Upper: Billet 6061-T6 A3 AR slick side upper is hard coat anodized black for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer.
Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside.