I don’t…if someone is so dangerous that we can risk them illegally obtaining a firearm then they should remain in prison (ie fufill their sentence). Once they do the time and are deemed able to rejoin society, they’re free, and should have the their rights restored. If not, we run the risk of a tyrannical government (even worse than we currently have at the federal and state levels) charging people for BS crimes, and giving them a “plea deal” to avoid prison (or a very light sentence), and there goes your gun rights. If you’re a free person, you’re free.
As for background checks, same type of thing above…it is essentially asking for permission to exercise freedom. I think it’s hilarious that people still trust the feds after what we’ve been seeing that last several decades.