Ics M4 gearbox or piston locking?

[DPU-Platoon1]

Got a problem with an ics M4 I'm not totally sure what's at fault but assume it's gearbox or piston

Basically it fires for a short period then locks up with no noises audible when trigger is pressed just motor gets hot, hence something is jammed. Pressing the spring release on the side doesn't release spring tension when fault happens, tension in something is release when I lever the upper body from gearbox

Any pointers appreciated

[airsoft_ben_1989]

Re: Ics M4 gearbox or piston locking?

had it apart recently? motor wire correctly attatched ie red to red and black to black

[The Keeper of Secrets]

Re: Ics M4 gearbox or piston locking?

If it 'fires for a short period' the motor is connected the right way.

I'm 90% sure that standard V2 gearbox lockup. Your entire gearbox needs a clean.

[DPU-Platoon1]

Re: Ics M4 gearbox or piston locking?

It's a split gearbox if that changes anything and motor works fibe

[DPU-Platoon1]

Re: Ics M4 gearbox or piston locking?

Took the gearbox apart and found yaw control lever wasn't moving smoothly aswell as the trigger switch and a shim was bent on the piston gear

Put it back together and all seems well