First of all, you lost whatever support I might have given right out of the gate with the high age restriction.
Secondly, criminal, terroristic, antisocial, and psychotic behavior, I can understand. To be fair, logically speaking, those issues should bar just about anybody in the United States government, and the overwhelming majority of the Hollywood elitists who support these acts, except not at all, because they can literally just buy their way out of any sentence.
Finally, speaking of elitism, that brings me to my next point, because the rest of these rules would bar almost the entirety of the working class from owning guns.