Call bs on me then,the p-10 I just sold DID NOT INTERLOCK WITH THE STRIKER, PERIOD. And yes the bevel on the backplate is, and always was a band-aid fix. It quite possible that these changes were made in line, so as not to disrupt production, as I said, the one I just sold the backplate did not look anything like the one in the pic, so, I can only assume that changes were made, and new parts were supplied to assembly, as the older designed parts were used up. This is a common practice.