It's asinine to suggest that due process is thrown out the window when we introduce a regulation in the interest of public safety and community standards. Denver provides assembly permits for people to protest in the city. If they are denied, they can challenge it in court. Is their 1A right violated in that scenario? Of course it isn't.

Now, apply the same common sense to someone who was recently flagged for domestic abuse or some sort of mental health issue. It may be harder for them to acquire the gun, right then and there, but they aren't thrown into a cell without any kind of recourse or right to court challenge - they just show higher potential to do actual harm to innocent people & are rightfully screened more closely. Common sense.