Rap4 Tornado Paintball Electric Marker Silver + Tacamo Arc Hopper Powered by either CO2 or N2, 0.68 caliber Paintballs (not included), Velocity: 280?300 fps Semi; 3-Burst; Full Auto firing, Adapter: DSR low pressure regulator, Aluminum Alloy die-casting powered by one rechargeable 9V battery (not included), Vertical feed, closed receiver with CNC processing, Corrosion-resistant aerospace grade Aluminum with wear resistant Teflon finish on all internal parts and dual-colors fade anodizing surface treatment Tacamo Arc Hopper