Barrel: 416R Stainless steel. Chambered in 223 Wylde, with a 1:7 twist, M4 barrel extension, and a rifle length gas system. Barrel is is finished off with a PSA 15" Lightweight M-Lok free float rail, .750 gas block, and A2 flash hider. Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer. **This upper does not include BCG or Charging Handle
