I have a Kral Puncher Breaker and my O ring for the main valve closed to the stem is damage and there is air leaking out after I take a shot please help me what size of the o ring and how can i get it, I appreciate your help!
I think your valve may be broken,.Troy Hammer at annihilator airguns and has a video on YouTube on how to take apart your gun and replace the valve. The valve is about 7 bucks from pyramyd air. Sorry to see it happen to you.
Judging by the mushroomed tip of your valve stem, you might have some other issues. Either poor quality metal used in that gun or you have your hammer spring cranked in the quest for power. It would explain the failure.