[CanadianBeast]

Well, here's why I thought it might be the battery;

I bought the gun about 3 weeks ago, and have plinked around with it around the house with an 8.4v 1500mAh large battery with no issues. I then had a 9.6v 2000mAh large battery made for me, which had a little charge on it. So before I charged it up, I tested my friends TM mag through it. No problems. I put a full charge on it and the first game I play (I usually play on semi-auto) and I start jamming up. Without a mag in it on semi I notice the piston doesn't get a full cycle on the second shot.

Eventually after the first game(basically of me unjamming the gun constantly) it just seized up. When I got home later I took it apart and saw screw had fallen off and jammed it

And yes, it is a CA piston