A backlash against policies of shielding residents who are unlawfully present within a given jurisdiction is developing across the country, but in the rush to report on these activities at the Federal level the actions of multiple States moving in this direction have been largely glossed over.
Lawmakers in many states have introduced bills which would make it illegal to possess devices which accelerate semi-automatic rate of fire, though each approach to the subject takes a slightly different angle. Definitions and specific devices that would be banned vary in each case. Some are more expansive, covering any accessory which has the potential to accelerate rate-of-fire. Others only ban a few specific items.
Normally federal law applies to all states and localities with no exceptions. However, there are many examples of where states have passed legislation directly contradicting federal law. While the federal government has the power to intervene and enforce their laws at any time, they have not taken much action for a few key laws.