Not only is there no case law, there's no human being supporting this argument. It's perhaps not the way I would have done it, but the fed could always arm the mil the same way it armed the regular army. And again, IF!!!!!!!!!!!!! the fed gov passed a law such that it required all men be armed for mil service, I've already said I'd like it. No such law exists now, and the states have the power to regulate firearms.
With your view of the Constitution, the right to defend your family and yourself with a firearm can be criminalized by a State. And I know you just hate it!