So I think I have the same issue as this:
http://airsoftcanada.com/showthread....uble+fire+semi
I cracked open my mechbox and pulled the M120 spring and replaced it with an SHS M90 so I can run this in an indoor field with a 350fps limit. I also popped in a 7.4v LiPo which is brand new and fully charged.
In Semi, it fires at least twice and after releasing the trigger I can still hear the motor/gears winding down a bit. Every five or ten pulls, the trigger will lock up like the safety is on. Full auto runs fine.
Is this just the over-cycling issue or does the trigger locking indicate another issue? I may have been a bit overzealous cracking open my mechbox on a brand new gun with no experience...