Guns can be made by using 3d printer. Switches and link that turn ordinary guns into machine guns/pistol can easily be made.
3d printers are boon to MDS, manufacturers, construction industry, and now to gun enthusiasts, terrorists and gang members.
Guns that are invisible to x ray can be made using 3d printers.
Will they license 3d printers next. Is this the new weapon of death and terrorism?