The United States Constitution
Amendment IIA well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.
Supreme Court of the United States District of Columbia vs HellerHeld: 1. The Second Amendment protects an individual right to possess a firearm unconnected with service in a militia, and to use that arm for traditionally lawful purposes, such as self-defense within the home.