The Crosman Full Auto R1 BB air rifle is fueled by two 12-gram CO2 cartridges and a 25 round drop-out magazine. The rifle has a 1,400 round per minute rate of fire, and a velocity of 430 fps. The rifle is customizable with a 6 position adjustable stock, AR-compatible buttstock/pistol grip, and a Picatinny rail for accessory attachment. The R1 has an overall weight of 6.07 lbs.