This link shows a site showing how to build a potato spud gun using PVC pipe. The used materials are 1.5" PVC pipe (2 feet barrel), 1.5" to 3" expander, 3" PVC pipe (1 foot chamber), 3" female threaded plug, 3" threaded cap, push button BBQ lighter, purple PVC primer and PVC cement/Glue. The PVC pipe is to be cut twice as long and half the width of the chamber. These are joined using spreading cap and later the lighter is fixed in it. The Potato spud gun made of PVC pipe is ready for entertainment.