“The right of the people to keep and bear arms is an extension of the natural right to self-defense and a hallmark of personal sovereignty. It is specifically insulated from governmental interference by the Constitution and has historically been the linchpin of resistance to tyranny.
“...The principal reason the colonists won the American Revolution is that they possessed weapons equivalent in power and precision to those of the British government. If the colonists had been limited to crossbows that they had registered with the king’s government in London, while the British troops used gunpowder when they fought us here, George Washington and Jefferson would have been captured and hanged.”
-Andrew Napolitano, 10-Jan-13 (Link)