outlaw the internet? 3d printers? metal working machines?
make his own gun because he couldn't legally own one then killed 5 people (mass murder)
traceable gun LOL you don't attempt to trace a gun until after a murder, then what good is the trace?
got theirs from the neighbor via straw purchase, don't know how the laws fall in the time line. But they used ar's to shoot up their work place.