I have a G and G M4, got it in a trade. I fixed the motor grip, fixed the dust cover shimmed it and disabled the blow back(still have all the parts), gave it the best possible air seal with stock parts. Shooting at just under 400 with .2 gram. Has built in spring release, great feature for saving your gearbox life. Gearbox was in excellent shape, the original owner was a chairsofter.
It start life as a ASGI PWS diablo. The person before me installed a ics pistol front end on it. Willing to let it go for 170, more if you want the suppresor that allows the bbs to glow in the dark. For pics txt 480 773 0335.