While out in Prescott I lost the screw that held my stock together, It isn't a quick release pin.
The best I could do is find an exploded diagram of a similar model to my gun.
http://www.airsplat.com/Manuals/ERA-CA-MP5A2-7.jpgThe part I need is located next to the trigger, its labeled as MP010-2 and S2003203, if that doesn't help it looks like a long bolt with a female thread on one side in which a small machine screw would attach.
I can take a few reference photos of the one I have left if it helps.
If you know what it is, what would be the best place to look for it. I am at a loss on this one.