The Stormer Military Style Paintball Rifle from Spyder .50 Caliber raises the bar for all Mil-Sim Paintball markers. The Stormer"s lightweight and compact design makes it the perfect marker for stealth attacks against your opponents. Standing apart from other scenario markers the Stormer has phenomenal accuracy, which allows you to hit your target with ease. The new Eko Valve System enhances the Stormer"s air efficiency, giving the user up to 3,500 shots per 20oz. CO2 tank. The marker comes with the new assault style adjustable shoulder stock and is equipped with multiple picatinny rail mounts for endless add-ons. You can operate the Stormer on CO2 or Compressed Air.