What is the right to Bear arms?

It seems to me that, the right of the people to keep and bear Arms shall not be infringed [in order to maintain] a well regulated Militia, [a well regulated Militia] being necessary to the security of a free State. So the right to bear arms, protected by the constitution, means the people must be a member of said well regulated Militia. Then gun owners must be active service men/women in the National Guard, our present day well regulated Militia.