PSA 16" M4 Carbine-Length 5.56 NATO 1:7 Nitride 13" Lightweight M-Lok Upper No BCG & CH

Barrel: 16" 4150V Chrome Moly Vanadium steel barrel, chambered in 5.56 NATO, with a 1/7 twist, M4 barrel extension, and a Carbine-length gas system. The barrel is finished with a .750" diameter low-profile gas block, PSA 13" Lightweight M-Lok Free Float Rail and an A2 flash hider. New Rail design with a fresh look and stippling on the sides of the rail for increased grip.Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feed ramp cuts, these upper receivers are made by right here in the USA.