Read and decide
Prof Volokh, Orin Kerr and David Kopel are discussing if Heller also lays out an express right to self-defense. Hit the link on each of their names to read what each has to say on the matter.
Personally, I’ve always been under the impression that self-defense was a human right that a judge couldn’t give or take away. Granted, the UK legal system seems to think otherwise. But I would have left long ago once they decided that, so I guess that this is a rather pertinent discussion.