Daddy Foote

I need some advice on a G&G Q5 gearbox V2 with blowback rear wired. after using full auto for about 20 rounds, had a break then when I went to start another game it stopped working. I could hear a faint click when the trigger was pulled. I took it apart (first time fun) the rail on the piston was engaged on the final gear, but shouldn't be. Also noticed that where the blowback piston connects to the shell, the shell was cracked so I need a complete gearbox or shell /case. So a complete V2 gearbox or a complete V2 shell.

Seams to be a weak point where the blowback piston attached to the main piston tube.

The gears and the piston rail also look worn. So I could get new gears.

What would be best?

Does the rail come off the piston or would I need a new piston?

I've put it all back together and it works again. But I'm guessing I'll have to do something soon or it could lock up again.