If they’re going to regulate X (intent: into oblivion), they must precisely articulate what constitutes an X. There will always be someone to build and sell something that is almost, but not quite, X.
Pushing the regulations to the edge of raw materials pushes the technology to other solutions. CNC and 3D Printing machines are widely available: insert raw material, load program (protected as free speech), press Go, get prohibited product.
ATF need realize this does not end well for them.
Totally agree. Or....
Have courts like that portrayed in the movie Idiocracy which will make/adapt the law and nail you for anything.