[jtc331]

That's exactly the point of the 2nd Amendment.

In fact, it goes further. The point of the preamble (the part of about the necessity of a militia) isn't there to say that the right to keep and bear arms is necessary so that the state can have an army. Rather, it's positive law saying that citizens should own guns to be able to form a militia in order to fight back against a tyrannical government.

And the start of the Revolutionary War provides more supporting context for this: the British march that begin the war wasn't intended to start a war. The objective was to disarm the citizens. The authors/signers of the Constitution wanted to ensure that the state could never do that to the citizens again.