That is what I was essentially getting at. Now, if you carry it through chronologically, there really isn't a good reason to change for the SR either. It is a box that holds things, with a spring to push the things up when one is taken out. It is not rocket surgery.I agree on the P series, but the SR and American I can't see why Ruger couldn't have made the SR mags work in it and you know if they had done that, SR owners might have gone and bought the American.