Picked up my ACR yesterday and got a chance to to put 200rds down range. First two magazines and absolutely no issues. After that every 3 to 4 rounds the trigger would not reset. I needed to manually pull the trigger forward or slap the rifle. To me this does not seem like a "break in period" issue. Took the rifle home pulled out the trigger pack and I didn't see any burs or binding. I did about a 100 functions checks and could not get the rifle to repeat the issue I had on the range. Has anyone else had a similar problem?