In the US, citizens have been allowed to keep and bear arms so that during wartime, the soldiers will have at least a familiarization with the weapon they are issued...it has nothing else to do with anything. By the way, sir, exactly who was it that liberated your country at the cost of thousands of young lives, in two World Wars, after your non-shooting-familiar soldiers waved a white flag? Now do you get the idea?
Those who are curious about Case Law concerning the Second Amendment can read Federal Court decisions regarding the Second Amendment...all of them to date. Read them for yourself and be enlightened.
http://www.nraila.org/
Research & Information Division
Federal Court Cases regarding the Second Amendment
You'll discover that we ARE protected, but I want each of you to know how and why, right from the actual documents. That will give you ammunition when the "anti's" attack.