This happened as a result of my stock as well. I know there are some places that you can buy stronger pins but they are like $20 and I dont recall where it was at. What i recently did to solve this problem was find a nail or bolt of the same diameter and cut them down to a little longer the the stock pins. They seem to fit snug enough not to fall out during a game. But with a bit of force they come out. I havent played a game yet since I have done this so I cant garenty that they will stay fixed.