This is, of course, a hilariously bad idea, even if you think that gun control in general is a good idea.
Don't understand why? Well:
- This action relies upon deliberately bad logic to re-define bump stocks as machine guns. Basically, they're lying about bump-stocks being covered.
- Bump stocks have been legal for over a decade. There have been MULTIPLE ATF letters that said they were legal.
- The ATF is taking the position that they were always illegal, they just didn't realize it. Therefore the takings clause doesn't apply.