I have an older Mark 1 thats well used but I clean it after every range day. My current issue is that when I pull the bolt back and release the gun goes off and fires. Did I disassemble and reassemble it wrong? Or is my spring and firing pin old and worn out? Any information would be much appreciated.
This is more indicative of a sear, hammer interface problem. I had this problem on my MKI as when the pistol was cocked it would fire when the safety was let off. The notch on the safety that fit over the sear was worn open to the point it was barely holding the sear back on the hammer face. Needed to put in and fit a new safety.