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Air tank - 3L Valve - 25mm ball valve Barrel - 65mm X 1m Pressurised to 120psi this cannon can shoot tennis balls 100m. I do have a modified sprinkler valve for it but I don't like the noise it makes (sounds like a fart)
The barrel will need to be a lot thinner but this cannon will be unpractical for shooting something so small. A different design with a solenoid valve will make it more like a rifle
Could it be adjusted to shoot nerf darts?
Cool!

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