I think that quote may be bogus. I have noticed lately that the Left is planting powerful but bogus quotes on the web, often with fancy graphics. I think they are hoping these will be picked up and repeated by conservatives on various blogs. Then they blast the conservative for posting a bogus quote. It's happened to me a few times recently.
--- Adolf Hitler (1889-1945), April 11, 1942, quoted in Hitlers Tischegesprache Im Fuhrerhauptquartier 1941-1942.
Our Forefathers knew what the hell they were doing by making sure the Right to Bear Arms was enshrined in the Bill of Rights.