Hi, I've got a model 60-12, which has the frame mounted firing pin and MIM hammer & trigger with no lock. My question is just out of curiosity, as my revolver is just fine. If a person ever needs to replace the firing pin, what is involved in doing so? It's hard to tell from the schematic that is in the owner's manual, and I don't remove the side plates from my revolvers for no reason, so I haven't taken a look inside. Again, my question is just to satisfy my curiosity. Thanks in advance for any responses.