Hi Neil, Since I know you're not the only one wanting double stack .460, I figured I'd make the discussion public. While we do make a .460 Rowland Ramped kit that will drop into your Para, sorry to say that we cannot guarantee it to function reliably on the wide body frames. The problem has been the inability of the magazine springs to keep up with cycle rate. If you wish to proceed, I suggest the heaviest magazine spring you can find and making the inside of your magazines as slick as possible. Instead of hi-jacking dillinger & canebrake's build-off thread, thinking we ought to start a separate one for this topic. I'll start one and link to it in the next day or two (schedule allowing ).