Get in the game with the Valken Blackhawk paintball gun. Uses 68 caliber paintballs and requires a Co2 or HPA tank, works with either. Also requires paintballs and a paintball hopper/loader. Features vertical foregrip, adjustable rear stock, rifle style sights, upper and lower picatinny rail so you can add whatever accessories you need like flashlights, lasers, red dot sights, etc.