PSA 7.5" 300AAC Blackout Nitride 6" Lightweight Hex M-Lok Upper Without BCG & CH

Details Barrel Length: 7.5" Barrel Profile: Heavy Gas System: Pistol-Length Barrel Steel: 4150V Chrome Moly Vanadium Barrel Finish: Nitride Chrome Lining: None Muzzle Thread: 5/8 x 24 Chamber: 300 Blackout Twist Rate: 1/7 Barrel Extension: M4 Diameter at Gas Block: .750" Gas Block Type: Low-Profile Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 Aluminum Receiver Type: M4 Handguard Type: PSA 6" Lightweight Hex Full Picatinny M-Lok Free Float Features Barrel: 7.5" 4150V chrome moly steel. Chambered in 300 Blackout, with a 1:7 twist rate, M4 barrel extension, and a pistol-length gas system. The barrel is nitride treated and finished off with a PSA 6" Lightweight Hex Full Picatinny M-Lok Free Float Rail, a .750" low-profile gas block, and an A2 style flash hider. Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. Uppers include forward assist and dust cover. These uppers are made for us right here in the USA by a mil-spec manufacturer.