Well....it is a fact that the "Founding Fathers" are long dead and whatever framework they envisioned was just that.....a framework. And...as good a framework as that might have been, concerned as they were over undue religious influence, it is unlikely their visions of the future included corporate influences which would make the Church of England appear philanthropic.
Who among them could have envisioned concerns over air traffic control, nuclear proliferation or, with the possible exception of Jefferson, internet porn?
Clearly, in practice if not in rhetoric, they intended that the country be run by preferably landed, educated or at least literate, and, yes, wealthy individuals capable of embracing philosophical thought and implementation of high minded moral imperatives.
The concerns of the fledgling republic with regard to armament would have been defensive in nature. Unlikely they would have advocated a militia with the implied purpose of removing themselves from governance by force should the perceived necessity arise.
The 2nd amendment was certainly designed to deal, at the time, with potential European incursion, and of course, eradication of those pesky Indians. And so we could have fresh opossum for dinner.
I suppose the National Guard might have surfaced as a militia, had they not all been sent overseas. However, it must be said that private militias.....the ones the FBI are keeping an eye on.....serve no purpose beyond providing the members thereof with the notion that when the expected and even longed for apocalypse comes down, they will be in charge and able by force to impose their typically narrow minded and egocentric wills upon whoever's available and otherwise undefended.
I don't know exactly who these leftists are who are clamoring to take away 2nd Amendment rights, but they seem to be, for the most part, residents of the overindulgent imagination of the NRA and the conservative candidates they endorse.
As a flaming liberal myself (ask anybody), the private ownership of firearms is seen to be as positive a deterrent now as it was then when it comes to National Security and for fighting duels. As far as registration goes, I believe if you own 10 guns, you should register at least one of them.
I don't know if we should be allowed to have the same weapons as the military, though....they got nukes!!!!
Coondog

On the other hand, a battle tank would be a great equalizer against seasonal incursions of mad cows and opossums.....or an attack helicopter.....that would be awesome!!!