I recently bought an M1 from CMP. It looks pretty good and shoots OK except for one thing. Sometimes the recoil causes the trigger housing to open up. When this happens you have to be careful or the entire trigger assembly will fall out. A fellow at the range thought the problem was caused by an ill fitting stock that was not thick enough for the trigger assembly to properly clamp down on the stock when closed. Has anyone else had this problem and found out how to fix it? Thanks.