"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."
I'll give my interpretation of this:
When this was written down, people were afraid of crazy Brits invading their homes, so a militia composed of armed men could defend against them.
But it does not give anyone, and everyone the right to bear arms.
We do have a well regulated militia: It's called the National Guard. And their right to bear arms is not infringed.
Does not sound like it meant to give non-militia members the right to bear arms though.