The Crosman Full Auto ST1 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 boasts an intense 1,400 round per minute rate of fire, all at a jaw-dropping velocity of 430 fps. Even better, the rifle is fully customizable with a six-position adjustable stock, AR-compatible buttstock/pistol grip, and a Picatinny rail that provides endless accessory mounting opportunities. Stay on target with the included rail-mounted red dot laser sight.