These forged lowers are quality-made from 7075-T6 aluminum and are marked ,MULTI, for caliber. Finish is hardcoat anodize. The mil-spec diameter 7075-T6 buffer tube is hardcoat anodized, has 6 adjustment positions, and is fitted with a DPMS CAR-15 injection-molded pistol brace. The fire control group is a DPMS Retro black oxidized, single-stage assembly.