But for the moment having the minus of time, material, equipment, accuracy, money, reliability, etc. Plus, people can already make guns at home using fairly sim

But for the moment having the minus of time, material, equipment, accuracy, money, reliability, etc. Plus, people can already make guns at home using fairly simple metalworking tools that are much less likely to fail badly than using 3d printed plastic. Or you could make a crossbow or something really basic. Is not that I don't see how certain people could be drawn to this idea, but other than as a pure engineering exercise, I really don't see the practicality, even to nutcases. Admittedly, nutcases might not be looking at this completely clearly however.