The Smith & Wesson M&P air-pistol is a .177 calibur BB repeater powered by one 12g CO2 cylinder (not included) that hides in the grip of the BB pistol. Features integrated, 19-shot drop out BB magazine, accessory rail, manual safety, and fixed front and rear fiber optic sights. Maximum velocity 410 fps. .177 caliber BB repeater Maximum velocity 410 fps Powered by one 12g CO2 cylinder (not included) hidden in the grip Integrated, 19-shot drop out BB magazine Accessory rail Manual safety Fixed front and rear fiber optic sights