Eh... That is not clear at all. Given typical coil gun efficiencies (single digit percentages), there is absolutely no way that this thing is even remotely comp

Eh... That is not clear at all. Given typical coil gun efficiencies (single digit percentages), there is absolutely no way that this thing is even remotely comparable to a typical 9mm handgun (in projectile velocity and just general lethality). Just ask yourself-- how many people are killed by coil guns each year? Stopping their proliferation strikes me as utterly useless regulatory overreach that benefits exactly no one, and deprives many a nerd of a cool hobby project.