I've got a Krylon'd Cav Mk2 lower. I had originally run this with a .45acp setup with M3 greasegun mags. If you are unfamiliar with this lower it is wide nough for thompson or greasegun mags as well as standard AR mags. It is one piece with the pistol grip and buttstock. This one is an AR15.COM SEBR serial numbered lower. This lower has no fire control parts installed nor buffer but does have the removeable takedown pins. Right now AR15 receivers are rare as hen's teeth. Here's one ready to go. NOW $200! SOLD!!!