That said, [Jeremy Cook] made a minature bolt action spud gun! Using a custom ... pull the trigger (an air blower) and two expansion chambers toss compressed air behind your starchy projectile.

He’s made a spud gun from PVC pipe, powered by compressed air. It takes the form of a U-shaped tube with one side of the U being a pressure vessel separated from the other by a ball valve..

The spud gun worked so efficiently because it employed ... The pressure continues to build as the air is compressed until the force exerted onto the potato at the front of the pipe is so great ...