JT ER2 Pump Paintball Gun Pistol - .68 Caliber Paintballs Our item is a Factory Reconditioned ER2 paintball Pistol This is a .68 Caliber Paintball Marker Mode of Operation: Pump Action Included In Box: Pump Marker, One 10 Round Tube for Holding and Loading Paintballs (works like a hopper), Barrel Plug