PSA 7.5" Pistol-length 300AAC Blackout Nitride 7" Lightweight Hex M-Lok Upper With BCG & CH

Barrel: The 7.5" 4150V Chrome Moly Vanadium steel Nitride barrel is chambered in 300 Blackout, with a 1:8 twist, M4 barrel extension, and a pistol-length gas system. The barrel is finished with a .750" diameter low-profile gas block, PSA 7" Hex Full Picatinny M-LOK Free Float Rail and an A2 flash hider.Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feed ramp cuts, these upper receivers are made for us right here in the USA.Bolt Carrier Group: Full-auto profile bolt carrier group. Shot-peened, mil-spec Carpenter 158 steel bolt. Gas Key Hardened to USGI Specifications, fastened with Grade 8 screws, and Staked Per Mil-Spec. The carrier is 8620 steel M-16 full-auto profile.