The Crosman Full Auto R1 BB air rifle maximizes backyard fun! Fueled by two 12-gram CO2 cartridges and a 25-round drop-out magazine, you will have target cans flying in no time. The rifle features full or semi-auto mode, a genuine feel, familiar controls, an intense 1400 round per minute rate of fire, all at a jaw-dropping rate of up to 430 fps. Even better, the rifle is fully customizable with a 6-position adjustable stock and a Picatinny rail that provides endless accessory mounting opportunities.