The Marlin Single Action Revolver is a CO2-powered BB pistol built for backyard plinking and casual range fun. A single 12-gram CO2 cartridge lives in the grip and powers BBs downrange at up to 400 FPS from the 5" barrel. The 18-round integral magazine keeps the action going between reloads, and CO2 swaps are straightforward - the tool needed for cartridge installation and removal is built right into the right-side grip panel. Single action operation gives it a classic revolver feel that makes it as enjoyable to handle as it is to shoot. CO2 powered - single 12-gram cartridge housed in grip .177 caliber steel BBs Single action operation 5" barrel Up to 400 FPS muzzle velocity 18-round integral magazine Built-in CO2 installation tool on right grip panel Full-size revolver ergonomics