The Valken 6mm 2.5” Co2 revolver is a Co2 airsoft revolver that has everything you could want in an airsoft revolver. This Valken airsoft pistol is Co2 powered and functions similarly to a real revolver. The Valken 6mm revolver also comes with six brass cartridges and one speed loader to make faster reloads a snap. The cylinder holds six cartridges, and each cartridge holds one 6mm airsoft BB. The Co2 revolver can be fired in double or single action, meaning that the hammer can either be cocked back before each shot or the trigger can be used to cock the hammer and fire. We recommend our Valken 12g Co2 Cartridges for use with this Valken revolver.Valken 2.5" Revolver will not function correctly with Crosman Co2 cartridges.