Marlin CO2 BB Revolver Single-action trigger 18-round capacity Uses .177 caliber steel BBs Max. velocity: 330 FPS CO2 cartridge tool built into grip panel Marlin logo on both sides of frame Fixed front blade sight and channel rear sight Manual safety Trigger pull: 5.5 lbs. or less Barrel length: 4.73" Overall length: 11" Weight: 13.76oz Uses one 12-gram CO2 cartridge Officially licensed Ruger product