AIRSOFT!!!!!!!!!!!!!!!!!!!!!?

Depending on how much your willing to spend is gonna tell you if they're worth it. I wouldn't spend any more than $120 for a co2 air-soft pistol. Generally co2 will need some care ( cleaning, lubricating, etc.) depending on whether you have a blow-back or a non-blow-back. Blow-backs will generally need more care but, if you do take care of it, it will pay you back in the long run. Just taking care of it properly could increase the life from months to even years! Depending on the internals and the pressure the the co2 most shoot from 350 fps - 450 fps depending on the gun (if the fps is lower than 350 the gun isn't worth the money), and if the gun have a semi and full auto feature, on full auto they tend to shoot anywhere from 3- 10 rounds per second (rps). On semi auto they shoot as fast as you can pull the trigger. Just about the only way your going to mess the gun up is by either shooting it or taking it apart, there really isn't a way to keep you gun from breaking other than what I mentioned earlier about cleaning a lubricating the gun. There really is no danger of using co2 unless you take the canister out before its completely discharged. I hope this helped what you were looking for. Good luck!