Postby mless » Wed Jan 25, 2012 9:55 pm
My G4-18 did the same thing. I took the hop-up out and messed with a bit. Took the inner barrel out, twisted stuff, etc. From what I can tell, a part of the hop-up was upside down or something wasnt lined up right with the notches on the inner barrel. Either way, I fixed it and works now. Hope this helps.