The ruger 10/22 air rifle uses two 12 gram co2 cartridges to launch.177 caliber pellets from its 10 shot rotary magazine.Its magazine drops free from the rifle in authentic fashion and holds a 10-shot rotary magazine.Additional rotary magazines are available as an accessory.The receiver is tapped for the addition of an aftermarket rail made for the 10/22 making it easy to add a red dot or rifle scope.You can shoot the 10/22 air rifle in double action or single action.The single action trigger is very nice at about 4 lbs of pull.Not only does the 10/22 air rifle look like the ruger 10/22, it gives the air gun enthusiast the complete 10/22 experience with the quietness and convenience of co2 power.Action: Semi-AutoCaliber: 177 PelletCapacity: 10rdFinish: BlackSights: None, Drilled&TappedVelocity: 650 fpsPower Type: CO2