You can make bullets yourself just like you can make the gun. You may remember the assassination of Shinzo Abe.
In the US low powerd black powder is super easy to get you don't even have to take fireworks apart or do home lab chemicals stuff.
But you need something better than a 3D printer for bullets. So if bullet sales are regulated, there is no need to regulate 3D printing.
But you need something better than a 3D printer for bullets. So if bullet sales are regulated, there is no need to regulate 3D printing.