I was shooting my 4595 and all of a sudden the trigger wouldn't pull far enough to fire the gun. I checked the safety and it was midway between safe & fie. I tried o manipulate it so I could get it to fire, but no success. When I got home I carefully took the gun apart. When I got to the part where you pull the section back pull it up after sliding the lock to release the pin and lift it off , it won't pull up. I did manage to get the safety o the fire position, but when I took it the range it still wouldn't fire. Obviously I can't send it to Mom since it has a live round in the chamber. Any suggestions?