PSA 16" M4 Carbine 1:7 Nitride 13.5" Lightweight M-Lok Freedom Upper w/ MBUS Sight Set - No BCG/CH

Barrel : 16" barrel length Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. The M4 profile barrel is finished with Melonite. Barrel is finished off with an .750" diameter low-profile gas block, PSA 13.5" Lightweight 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 feedramp cuts,  these upper upper receivers are made for us right here in the USA. Includes :  Magpul® MBUS Sight Set, Black BCG & Charging Handle Not Included.