Bottom line is that while the proposed solutions will make lawful firearms ownership a treacherous trip through a minefield of rules, they will not stop the criminal, nor the insane, from doing their dastardly deeds, nor keep either from obtaining firearms.
In the absence of firearms, those truly bent on killing people will find other ways, as they have in countries where firearms are very difficult to come by.
Using everything from improvised explosives, bombs, vests, knives, rental vehicles, aircraft, and poison, the diabolical and murderous have succeeded in killing massive numbers of people, even on these shores. All that will change is the method, not the result.
It isn't the weapon, it's the murderer.
This is a pathetic increment on the way to banning and confiscation by those who believe themselves to be our rules rather than our employees and representatives. When it, too, fails to achieve what they say it will achieve, then they will be back for more, if they don't just cut to the chase right away.
It's also a bridge too far, because it will only convince multitudes of previously compliant gun owners to ignore the law.
A worthwhile read that details how far downhill we have gone.
https://billstclair.com/Unintended-Consequences.pdf[/url]