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