How to make a potato gun

1. Make a shopping list. Your shopping list for a potato gun will include:
   • 1 grill ignition kit (The small red button on the grill that clicks)
   • 1 4-inch diameter PVC 90 degree elbow (Or just a section of four inch pipe)
   • 1 fitting adapter for the elbow (Or pipe) with threads for a cap
   • 1 screw on cap
   • 1 4-inch to 2-inch PVC adapter
   • 1 4 foot long section of 2-inch PVC pipe.
   • 2-3 few cans of aerosol deodorant (for the butane)
   • 1 bag of potatoes
2. 
   Put the threaded fitting adapter on the elbow and screw the cap on it.
3. 
   Fit the 4-inch to 2-inch adapter in the other end of the elbow.
4. 
   Put the barrel in the 2-inch end of the adapter. If it doesn't go in, lightly tap it with a hammer. Make sure it is flush when you are done.
5. 
   Drill a hole in the side of the elbow. From here on out, the elbow referred to as "the Chamber." A word of caution:
   • Make sure your chamber is neither too long nor too short. Too long of a chamber and your spud will sputter out of the chamber too slowly; too short of a chamber and the spud will disintegrate before you know it.^[1]
6. 
   Stick the prong that came in the grill ignitor kit in the hole, and fasten it with a screw.
7. 
   Pick one of the wires that came in the grill ignitor kit, and fasten it to the prong. Fasten the other end to the bottom of the grill ignitor.
8. 
   Tape the grill ignitor to a comfortable place on your cannon. This will become the trigger.
9. 
   Fasten the second wire to the metal tab showing on the outside of the grill ignitor. Let it hang while you do the next step.
10. 
    Screw a screw into the side of the chamber so that it is 1/16 inch away from meeting the prong on the inside
11. 
    Fasten the wire you let hang from the grill ignitor to this screw on the outside of the chamber. When you click the grill ignitor, you should see a tiny spark jump across the prong to the screw.
    • Don't let your body touch any of the metal parts, your body will take the shock and you won't get a spark. It helps to cover up all of the wiring with electrical tape.