Long live BB gun fun! The Marlin Single Action Revolver is the fun way to plink those tin cans away on the weekend or anytime. Powerered by a single 12 gram CO2 cartridge (not included) housed in the grip, and 18 BBs at the ready in the integral BB reservoir, the Marlin Revolver has a 5 inch barrel from which BBs will launch at 400 FPS. CO2 cartridge installation and removal is a cinch with the tool need for this process built into the right side grip panel.