PRESENTATION OUTLINE
The Second Amendment has most recently been interpreted to grant the right of gun ownership to individuals for purposes that include self-defense.
At first it was thought to apply only to the Federal government, but through the mechanism of the Fourteenth Amendment, it has been applied to the states as well.
A 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
Some scholars point to the prefatory language "a well regulated Militia" to argue that the Framers intended only to restrict Congress from legislating away a state's right to self-defense.
In 1939 the U.S. Supreme Court considered the matter in United States v. Miller. 307 U.S. 174. The Court adopted a collective rights approach in this case, determining that Congress could regulate a sawed-off shotgun that had moved in interstate commerce under the National Firearms Act of 1934 because the evidence did not suggest that the shotgun "has some reasonable relationship to the preservation or efficiency of a well regulated milita.