I think anyone building pipe guns in the first place is rather likely to ignore the law.She will. Fully expect legislation banning the manufacture of firearms by anyone other than a licensed builder.
That ends it right there.
But it doesn't have a detachable magazine and one military feature
I definately think someone will end up in the ER, if they try to make those, it kind of reminds me of a Spud (Potato) Gun, I wonder if they will try to ban Spuds also, since it uses an flammable propellant vs. air or CO2?
not something I would want to take to the range but in a pinch would work....