Foxtrot Mike Products Mike-45 .45 Auto rifle lower receiver is a good option when considering building out a heavy hitting PCC rifle. These .45 Auto lower receivers come set up to plug in and play feeding from GlockA(R) .45 Auto magazines and ready for your .45 Auto upper receiver. Complete means these lower receivers come setup with Foxtrot Mike Products Mil-Spec fire control group, their proprietary bolt release and magazine release, and a rifle buffer tube with 8oz buffer and .308 buffer spring to handle .45 Auto round. Built from billet 7075 T-6 aluminum these are coated in Hard Mil-spec Type 3 Anodizing and made right here in the U.S.A. Mfg: Foxtrot Mike Products