The Crosman AK1 BB air rifle maximizes backyard fun!. Featuring full-auto and semi-auto options powered by dual CO2 powerlets, the Crosman AK1 flings BBs at 430 fps and 1400 rounds per minute. This modern take on an all-time classic comes with a 28-round removable magazine and a foldable/adjustable buttstock to give the shooter the ultimate in look and feel. Get ready to experience the fun that only a full auto BB gun can provide. Fully-Automatic, CO? Powered BB Air Rifle Fires BBs up to 430 fps and Over 1400 Rounds Per Minute Full Size, Real Feel, Dual Action With a Durable Synthetic Design 28-Round Drop out Magazine Holds Two CO? Cartridges and Spring Feeds BBs for Rapid-Fire Action Adjustable and Foldable Buttstock With Quad Mounting Rail System Platform Compatible Stock Tube and Pistol Grip