The Guard is first a state organization. It requires a federal order (federalization) to bring it to active duty for use outside of the state. That order, by law, can only be for 90 days UNLESS congress approves it and appropriates funding for it, otherwise it reverts back to the state.
This entire discussion is about the rights of individuals to keep and bear arms. The left's arguments against these rights has always been that it says to maintain a militia. I simply am pointing out that the purpose of this amendment is to allow the people to protect themselves against a corrupt government. If it is only a right to maintain the national guard, then it is not an individual right at all. Where does it require the bill of rights to authorize the federal Government to maintain an Army reserve? Or the States to use that force? NO IT IS AN INDIVIDUAL RIGHT just as is Freedom of religion, freedom of the press, freedom of speech.
otherwise you invite the government to decide what press is free, what speech is free and what religion you can practice.