Hello,
I recently purchased a TM G3 from someone on the forum and I was looking it over and opening up the gearbox and found that there was a lot of upgrades done. mosfet, tightbore, piston, piston head, cylinder, motor. When I saw the mosfet I thought I would try out a lipo in this gun for my first time. I placed a new G&G m100 spring in it because I wanted to bump the rof abit and I also soldered deans. I also reshimed and relubed the gun. When I charged the lipo up and tried to fire on semi the gun would either pull the spring back but not release until another pull of the trigger. Still on semi I just held down the trigger and it went full auto. I tried full auto and that was fine but it seems like the gun is really working the gearbox hard.

Is the semi auto problem only with the mosfet? Did the previous owner just take off semi completely when adding the mosfet? And why won't the motor pull back and release a m100 with one trigger pull? New motor?

Thanks for any help in advance.