The gravity feed hopper is going to be a perfect fit for the Spyder, Tippmann and Azodin entry level paintball guns as they have a slow rate of fire and will let gravity slowly feed the paintballs into your marker. If you are looking for a small upgraded hopper then the Dye Primo hopper would be what we would recommend the most.This loader system has a shelf inside of it to allow small movements to jostle the paintballs around to help them feed but without the need of batteries.