The Right to Bear Arms, is stated in The Constitution as:
The modern militia was officially created by the National Guard Act of 1902, in which all state militias were formalized under the authority of the National Guard. Gun rights argue that since the militia included most men, the militia is now everyone. Because laws regulating firearms do not interfere with the modern militia, no gun control law has ever been overthrown by the federal courts on Second Amendment grounds.
Court Case: District of Columbia v. Heller (2008)
In a 5-4 decision the court said the second amendment protects individual rights. To carry a firearm for lawful purposes such as self defense in your home.