Colorado went a different route with their laws.
August 1 you have to take a 16 hour course with a State approved instructor, then, you get a permit to buy a semi-auto firearm.
Then, the State published a 100-page list of banned firearms, which include almost any semi-auto.
When it goes into effect, a law suit will be filed.
A judge ruled that no one had standing to file a suit until the law goes into effect and actually harms someone.
Makes you wonder why trust in the government is at an all-time low.