I've been looking at doing an SBR for a long time and I think I'm finally going to break down and do it in the next month or two. I've got a couple ideas in mind, but I was wondering what INGOers have SBR'd, besides AR's. I'm leaning towards an UZI because I have a 16" carbine one and I can just order a barrel but I want to see what everyone else has done.