Ok, I'm starting to get frustrated. All I want is a 4 slot Pic rail for the frame on my Para P12. I don't mind drilling and threading, in fact I figured on it, may even need a backing plate if I can clear the recoil spring (aluminum frame). Every time I try a search, all I can find are flat bottomed ones, and it kind of needs a curved bottom for the frame to nest in. Am I going to have to do some machining on one, cut off the end of a rifle one, or flat out make my own, or does somebody know what I need to call it for a search? This seems to me like something that people would want to do from time to time.