If I were governor of Texas, or Missouri, or Oklahoma, I would decree that all men 21-40 who were born in the state or have lived there 10 or more year, and who are ciitizens and not felons or otherwise of questionable character, are now part of the state militia. They would be allowed, nay, expected, to carry a weapon that the state trains them on, keep it on their person or in a vehicle and damn if the feds can do anything about it. Call on them when there is unrest. There probably won't be any.
And why only men? I shoot better than most men, am better armed (once voted best armed Freeperette) and reload my own ammo. Most guys you describe couldn’t hit the broad side of a barn and I wouldn’t trust with weapons.
That is a system that could work.