The Crosman Full Auto A4-P BB air pistol is fueled by two 12-gram CO2 cartridges housed in the 25-round magazine. This air pistol sends BBs at a blistering 400 fps with a 1400 round per minute rate of fire. The dual action selector lets you choose between semi and full auto capability and features a quad accessory rail and removable red dot sight. The A4-P has an overall weight of 6 lbs.