Received my lonex m100 ver2 gearbox today and just wanted to share my experience with it. All I can really say is wow. This is a really nice gearbox for the money damn. Opened it up and everything sits nice and tight, its absolutely great nothing pops out. The only things I did to the gearbox was a type 0 cylinder instead of a type 1 and used the g&p nozzle so it would mate with the g&p hop up correctly. Other than that there were ZERO issues going into a g&p m16a3. The compression is also great, gun is shooting 415 right now but that will probably tone down a bit after some use. I am for sure going to have to get the lonex ver 2 gearbox for the g3, hint hint