Because nobody is printing those and using those that understands or knows anything or has done a any research whatsoever into the topic. I am trying to show you the distinction between 3D printed firearms and firearms that have been modified but still are assembled from factory parts. You are very incorrectly stating that a piece of shit plastic 100% polymer non-metal build and a factory assembled upper mounted on a 3D printed lower are the same thing. They are not.
Driving a car is dangerous. Do you plan to revoke your license. I’m not trying to be a dick, but you decided to take your family and leave this country for your own safety and now you are telling people because of potential danger that they should not protect themselves from actual threats to their lives.