The right of the people in the United States to keep and bear arms.

Second amendment to the U.S. Constitution, which reads in full:

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.

There is contention about the capitalization and punctuation and another version reads:

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.