Range testing indicates about a 50% increase in accuracy for potatoes, and pipe stands up to continuous 300 psi pretty well. This new barrel modification will send potatoes straighter and perhaps most important of all…safer. I say this as I have had experience with a stray potato every now and then, going where you might have not wanted it to go…(through my shop window).
Available in 1 1/2″ and 2″ SCH 40 and 2″ SCH 80 sizes only.
You can buy the pipe – HERE
I never built a potato gun, but plenty of people I knew back in highschool did. I can imagine that the rifling would really dig nicely into the potato and get a sweet spiral going.