Ok, a little bit ago, I bought the WE Hi-Capa 5.1 with the 40'ish round CO2 mag. When I got it, it fired fine for about 8 mags, nice and powerful, great blowback. Now however, I try to fire it and the bb is noticibly slowed(id guess 180'ish fps or less) and the slide barely moves back at all. I have to manually cock the gun after each shot. It sorta seems like the hammer thingy isn't hitting the release valve hard enough to release enough CO2, but I'm not sure. I did a search and couldn't find any problems that quite matched mine. I would be extremely happy if someone could help me solve this problem, as I love this gun.
Also, after taking the gun apart almost completely to try to figure out this problem, it seems a lot more wobbly now...is there anything I can do to fix that or will I have to live with it? It's not major, just a minor annoyance.