I am looking for a parts diagram for this gun. I need to get a replacement roll-pin and I don't know where to find the description for it. I noticed that when I changed the grips today on the gun, I could not get the right grip that came on the gun to fit properly. When I looked more closely, I noticed there was a roll-pin that had slipped out just a fraction and this was keeping the grip from fitting correctly. If you take off the right grip, and look at it from the underside, you can see a circular indention at the top of the grip. The roll-pin is directly under this circular indention, in the frame of the gun. I have googled for this parts diagram but cant come up with one. Thanks