And here are some interesting comments from someone else...
The Framers of the US Constitution didn't write the First Amendment with cable television, Internet communications or even the telegraph in mind. Should we limit the press's freedom of speech to the movable type printing press which was the primary means of mass communication at the time of the Framers?
I don't "need" my AR any more than Rosa Parks "needed" to sit in the front of that bus. My civil rights, like Parks', are not up for negotiation!
If the world is sufficiently dangerous that the police require semi-automatic rifles with large-capacity magazines, then should not the free citizens who are sovereign over the police and who also live in the same dangerous world deserve to similarly protect themselves from it? In fact, are not the citizens -- not the police -- always the first ones who are forced to face those dangers?