Dear inventors and the big man himself, I am currently in the planning phase of designing an enclosed pump action paintball slingshot with four rollers. If you think this is a good idea and would like to contribute; i would appreciate your advice and guidance. This is to be a legal paintball gun in the USA, so it has to be within legal limitation. It will also be bottom clip fed. More info and design blueprints are on the way. Once again, thank you all.