I'm a newbie, and I'm getting into AK's. I have a Yugo Underfolder with a Tapco G2 trigger. I've already shot 300 rds through the rifle and now I'm noticing that the trigger is not re-setting. It happens at random. When it happened to me yesterday I removed the dust cover and worked the action and it worked properly. Then I inserted the mag and shot off a couple rds and it did it again. I pressed the trigger a couple times and it did nothing. I double tap the trigger and it reset. What can I do to correct this problem? Any info would be greatly appreciated.