At that point it seems simpler to turn a couple of sticks and some string into a bow and arrow.
Such a law makes sense in countries like the UK, where it is extremely hard to get a gun as a normal civilian. The guns produced by 3D printer can be fired a limited number of time, and a long car drive allows you to buy a gun legally in the US.
How many shots do you need for this use case?
It's time that New York bans hardware stores, obviously.