Ok so lets take it in 1700s context... Arms was not exclusive to Firearms, it also inculding things like sword, bayonets and etc.
SO lets get to the tricky part, what is and is not an "Arms"?
Now as far as the coment about its the gun graber throwing the mud, you are way off base. Its the US Constitution itself that has made it unclear. The US cons is a Living document, being a living document is it up for interpretation. Lets just take the 1st ammendment.( since its less "polarizing" then the 2a.... remember the US cons is not A La Carte, if it applys to one part it applys to all.)
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
1st part is about free religion... So you can pratice any religion of your choicing, how you want, when you want...etc.
Well not really. Lets just say I get bonked on the head, see a "spirt" and it tells me the "truth out life" I publish a book and it becomes a best seller, I get 100k converts to my religion( yay for me), but lets just say that I make my own "10 commandments". If one of those 10 commandments was not to pay taxs or say molest your children--would you be allowed to Practice that religion freely?
Next part, free speach... We all know that free speach is not free, you scream fire in a theater, or go on TV and say "kill bush", lets just say your not going to be free.
Free press, as with free speach we all know the press is not free.
The part about peaceful assembly and petitioning the goverment over grievances, Has been upheld many times, but not with out its restrictions. You can have your "million man march" you just better get a permit 1st.
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anyways I have to get back to work.