So I used my JG SIG 552 for the first time yesterday (it has a version 3 gearbox). Since I was playing CQB, I was restricted to using semi for all of the games except for one. I found that when I pulled the trigger faster than 3-4rps, the trigger would stop doing anything and just make a clicking noise. When I switched it to full and shot a few rounds and then went back to semi, the problem was fixed, until I pulled the trigger too fast. When I was allowed to shoot full auto, I had no issues whatsoever. I also changed the battery and still had the issue. At the end of the day, my friend was describing the same issue with his rented combat machine. Any ideas/possible fixes?