Wow, thanks guys. I saw the Proton pack, I just wasn't sure if that was Peumatic or not. It would be at a camp, with little kids, so a combustion would be alot harder to get away with. squeaks, I really like the idea of more than one shot. It would be cool, This is goign to be a really fun project, ...

Ok, first off, this is my first post. I've been doing alot of reading. I was just wondering if anyone has thought about making a backpack cannon. I work at a Camp and we have Paint ball, I thought it might be fun to have a big one time shot cannon to do a wide spread shot on either side of our field...