I'm sorta simple-minded, so I have difficulty with angels and pinheads and dances thereupon.
So, it looks to me like I oughta start with the purpose of the BOR. That's pretty obvious from the Preamble; the BOR is to restrain the central government--the "State"--from abuse of power.
Seems to me it's hard to restrain a State if only the employees of the State have guns. Ergo, the citizenry is supposed to be armed.
Next thing is that one fella did most of the writing. I really doubt he wandered through the rose bushes and tulips with several dictionaries, picking and choosing among word meanings. Seems to me that if "the people" is singular one place, it's singular everywhere. That's pretty much what SCOTUS said in 1992 with Urriquez-Verdugo.
We already know that "militia" is just us folks, the male citizenry from, what, 16? on up to around 45 years. I'm too old to now be part of it. (What the heck. I already did my marching, 50 years ago.) Since we're no longer male chauvinist pigs, women are now part of the militia, and high time, I say!
In the Anti-Federalist papers, the proponents of the Second Amendment stated quite boldly that the right to bear arms did not apply to "the insane and those of ill repute". I've yet to hear anybody disagree with the idea that certain crazy people ought to have firearms. I pretty much am forced to assume that "ill repute" at the very least means what we today call "felons". At any rate, even the proponents agreed that there were certain limits to RKBA. The limits, however are well-defined insofar as non-nit-picking everyday english is concerned. (I have faith that there will always be those who envision the picking of nits as a career choice.)
So I have no difficulty in agreeing with the NRA/GOA/JFPO/etc. about the Second Amendment. The view is in accord with the Preamble...
, Art