IMO, you're not winning nationally with that kind of mandatory law. I respect what states enact. For now, I think it's time to get some disenchanted Republican gun owners on our side. There are some folks who are not so much Republican as they are anti-Democrat because of key issues, draconian gun laws being one.
Dostoevsky — "The degree of civilization in a society can be judged by entering its prisons."
IMO, This idea can be generalized. Our country has moved to dealing harshly with some groups of people marginalized due to certain circumstances. Examples:
Prisoners
Pot smokers (although this is improving)
Old folks
Mentally ill
Native Americans (especially those on reservations)
LGBT folks
Muslims
In some instances women are still treated as second class.
Many problems are left to worsen until people die or the police are involved and then people die.
Poor folks are often forced into housing programs that are ill maintained. Teens and young adults are drawn into drugs or dealing to cope or survive or both.
Clearly there are problems in the U.S. that are not addressed. The only reason "assault weapons" are getting attention is because "mass" shootings for the media are really ma$$ $hooting$.
For 2020 the CDC reports 19,384 firearm homicides. Last I heard long guns of all types (AR-15s being a subset) amount to under 500. I just don't understand the dedication to narrowing this issue to focus on 2 to 3% of the problem.
With around 46,000 suicides and 24,000 being firearm involved, that might be a good place to start if you're a politician who actually wants to help.
Well, off the soap box. Have a good weekend.