The original way paintball guns got their air power, CO2 cartridges have been used to power paintball since literally the first day the game of paintball was played! Paintball CO2 cartridges continue to be used today to power paintball pistols for scenario games, pistol challenges and force-on-force training, and are used extensively in scenario and tactical paintball! Valken is your one-stop source for paintball CO2 cartridges in any quantity!