My brother bought an AK last summer and it has been alot of fun to shoot until recently. It fires both when you pull the trigger and when you release it. Alot of fun but not exactly legal. It does that about 30% of the time and fires only on the release 30% of the time as well. Has any body else had a similar experience? Does he need to get a new trigger group/kit? Any help is apprecitated. Thanks.