Jones.R Oct 14, 2009 3:17am
i have recently bought a gearbox for my dboy m4. It is a stock King Arms ver2 gearbox wired to the rear. I got it into my gun no problem but, when i turn the selector switch it is very hard and will not turn like it did before. Also when i put the new gearbox in i put in the motor and it made a terrible scratching noise when battery hooked up and trigger pulled, i have tried to adjust motor placement. What can I do?
"Some people spend an entire lifetime wondering if they made a difference. The Marines don't have that problem."