Crosman Pumpmaster 760 Variable Pump .177 Air Rifle with Scope Doubles as a BB repeater or a single shot pellet gun Includes a 4x15 mm scope Fiber optic front sight, Steel rear sight is adjustable for elevation Shoots up to 700 FPS with Alloy Pellets. Ideal for target shooting.Kindly refer the user manual attached below for troubleshooting steps and instructions.