In this tutorial I'll show you how to make a high powered air gun with PVC and miscellaneous parts that you can find around your house or at your local hardware store. This gun has a low volume high pressure air tank and a short barrel to maximize the projectile's velocity. It is equipped with a modified sprinkler valve to release the pressurized air instantly. The air gun can shoot potatoes or anything that can can fit into it's 1/2' barrel.
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Notice: Please be safe when following this Instructable. I am not responsible for any injury or damages you cause as a result of building or using this air gun. Use gun safety; do not over-pressurize the air tank and never aim or fire projectiles at anyone or anything other than the desired target.