Daisy's PowerLine Model 5501 is a CO2 pistol with semi-auto blow-back action. Load the 15 shot clip, drop in one of Daisy's 12 gram CO2 cylinders and you're ready for hours of target practice and marksmanship training. Daisy's PowerLine Model 5501 pistol is appropriate for adults and those ages 16 and older with adult supervision. Specifications Weight: 1.00 lbs. Action: CO2 semi-automatic blow back Sights: Blade and ramp front/Open rear sight Safety: Manual trigger block Max. Muzzle Velocity: 430 fps. Overall Length: 6.8 in. Caliber: .177 cal. (4.5 mm) BB Barrel: Smooth bore steel Max. Shooting Distance: 209 yards Capacity: 15 shot clip Metal frame with Molded grips