If you are framing the Second Amendment in the heritage to Magna Carta, then you must recognise that it is specifically feudal, in that it is in the service of Law, which the Charter had a lot to say about, establishing the first neutral legal system in the UK for hundreds of years. And to claim that the Charter is uniquely of benefit to the Barons is nonsense, if you read it: it had much to say about the Laws of Succession and of individual property at all levels of society, much of which was against the Barons customs and practices.

The evident consequence of the NRA argument in that it allows all to shoot it out at will is actually in denial of the first principle of the Constitution, the enjoyment of life. It also denies the ancestry of the Constitution, in the Charter. Clause 39 remains to this day: "No free man shall be seized or imprisoned, or stripped of his rights or possessions, or outlawed or exiled, or deprived of his standing in any other way, nor will we proceed with force against him, or send others to do so, except by the lawful judgement of his equals or by the law of the land."

And in plain common sense, I think you now have adequate pragmatic precedent to call their bluff.