This category includes co2 airsoft revolvers. This type of replica is a bit more rare on land, the principle being to reproduce a revolver, usually 6 shots. Many aftershocks again the principle of barilet using false cartridges in which is inserted a ball 6mm airsoft. The most famous being the Dan Wesson. Co2 is one of the great families in airsoft replica, you use only 12gr cartridge to propel your ball 6mm, for some, less binding than a gas cylinder. Remember to adjust the weight of your balls depending on the power of the replica, usually between 0.20gr, 0.23gr and 0.25gr.