Chrome-moly vanadium steel barrel chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a carbine-length gas system. This A2 profile barrel is finished with a 13.5" DPMS M-Lok free-float handguard, low-profile gas block, and A2 flash hider. These forged lowers are made from 7075-T6 aluminum and are marked ,MULTI, for the caliber. The finish is hard-coat anodized. The Mil-spec diameter 7075-T6 buffer tube is hard-coat anodized, with 6 adjustment positions, and is fitted with an M4-style stock, DPMS Retro A2 grip, Retro aluminum trigger guard, and DPMS Retro FCG.