“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.”
We have an individual right to self defense and to that end we have a natural right to keep and bear arms.
Furthermore, there will be times when we, as individuals, should band together and collectively defend the security of our free state. This banding together is called a militia. As individuals, we have the right to form militias. And when we do, as individuals we must be responsible for our individual actions.