NEED HELP AEG NOT FIRING!!!!!

[roninswd]

Ok here is the deal.....

I have a CA M15A4 and the Main drive gear that the motor touches got stripped. We tried replacing it with another drive gear while keeping the other two gears CA. Well now the piston locks in the rear position. I am stumped....I was planing on getting high torque Systema gears. I was wondering if anyone had other suggestions on a fix.... me and Kac are stupified by the lack of firing b/c everything seems to line up.

If anyone can tell me what I need to get please tell me!!!!! I can buy pretty much any part for a M15A4 b/c I got a scholarship and now I have more fun money!

[ghost]

The new gear is the problem. Been there done that. Most gears look alike but the teeth are a lil different. You need the same kind to go back in it. I've been through a few guns that when I changed that gear it did the same thing but when I put the original or a new one of the same brand in it worked fine again.