The Crosman 2240 can be a CO2 powered single shot, bolt action pistol. It requires.22 caliber pellets and shoots at a decent 460 feet per second (fps) muzzle velocity. The barrel is 10 with. long and salvaging rifled can make this an awesome fantastic target shooter out to 30 yd. or it. https://airgunmaniac.com/ is very popular right now there is a considerable variety of aftermarket...