I bought the Wingun Panther 801 CO2 pistol about a month ago, and it has worked amazingly well. I've shot well over 200 shots in a day and there has been no jamming or leaking of CO2. The FPS is great, and the magazines are a lot cheaper than most gas pistol mags, but the downside is that each magazine only has about 14 or so rounds each. It is almost full metal which is awesome, but the laser was pretty easy to break and there's no replacement that I've found for it which stinks. It feels good in my hand, however, and the weight is really nice. Also it has a very nice blowback action. Overall, I am very pleased with this pistol, and I will continue to use it as my secondary weapon in battles.
Easy to take apart
No replacement laser
Very small capacity magazines
Hopup key is very small and can be lost easy