WTF?
In the part of the constitution (the bill of rights) that expresses the rights of the INDIVIDUAL, they decided to lump in that A STATE HAS THE RIGHT TO FORM A MILITIA?
That makes absolutely ZERO sense.
You make zero sense. The actual words in our Second Amendment clearly declare what is Necessary to the security of a free State; it is mostly definitely not, the whole and entire concept of natural and individual rights.
It is you who are confused. So that the State CAN remain free, it is essential that the natural Right of defense be acknowledged. Firearms ownership by the PEOPLE is how that is maintained. Not the government, the PEOPLE.
Do you follow current events? Imagine small arms held by the Syrian People, against the 20th Century war planes dropping ordinance and chemical weapons. Whose winning those engagements?
Then consider the effect if citizens could own the arms capable of engaging a 21st century military force in the US? In my opinion, having served on a Destroyer in the late 60's, how that vessel would have done against the 21st Century Navy - not well and not for long.
Your reasoning is absurd. Today the cost and size of our military, and the training, cannot be defeated or even slowed by a civilian force, and even if the arms of war were legal in the US. Have you thought about how these arms might be used in small engagements against the civilian population (think criminal gangs).