Tanfoglio Witness 1911 pistol Uses 12-gram CO2 cartridges Semiauto 18rd removable BB magazine (also holds the CO2 cartridge) Fixed front and rear sights Blowback Single-action Metal construction Checkered grips Single-action only The box states that this gun comes with Hop-Up (spin), but it does not. The owner"s manual states that this gun is double-action and single-action. That is incorrect. It is single-action only.... Tanfoglio 1911...realistic!...