Paintball Hoppers come in a wide range styles, shapes and price ranges. A gravity fed paintball hopper is a simply but effective way of loading paintballs with out breaking the bank. Gravity fed loaders should only be used on Semi-auto paintball guns. An electronic paintball hopper, like the Halo Hopper, Empire Prophecy or the Dye Rotor will feed paintballs at a much higher rate of fire and are a must for any electronic paintball gun.