Okay so teeth shot on upper piston. (ICS M4)
Happy to assemble new upper gearbox etc.
My noob question is what position do / does the lower gearbox teeth need to be in when reassembling?
I know these can rotate / function while the gun is in two parts (so to speak) and I don't want to put the upper and lower back together with lower gearbox in wrong place / rotation. Any ideas or suggestions or doesn't it matter?
Please note the world of internals are new to me - have managed a hope change and assembly then the upper gearbox - just want to get it returned in right position!
Thanks
(ps any pics of the correct position would be a massive help!)
