Okay, so my piston head is at its bitter end, with compression problems galore, i decided to swap it out for a new one, (Modify Polycarb, the one Amos recommended in his review). Anyway so the gearbox is stuck in the receiver, wont come out. I believe i have taken everything out.
I have included some pictures and a video, you may be asking about the pin, but in the video you can see it as far as it will go out, which later, as you can see, does not hinder my ability to get it out.
Im not sure of what the problem is.
It seems to be stuck in the rear.
Sorry for the camera quality, old shitty camera, should get a new one :P
YouTube - Reciever Gearbox Issue.AVI
Thanks again for all your help.