How does a co2 pistol work?

A CO2 pistol operates by using compressed carbon dioxide gas as its propellant. The gas is stored in a small canister or cartridge, which is punctured when the trigger is pulled. This releases the CO2, creating pressure that propels the pellet or BB out of the barrel. The mechanism can vary between blowback systems, which mimic the operation of real firearms, and non-blowback systems, which are simpler and often more efficient.