The 2A was written with tyranny in mind but the 2A does not mention tyranny. It recognizes militia, recognizes security of free state (which can come from foreign sources), and the right of the people to keep and bear arms.

If you start with the right to self defense, and add a right to bear arms => you now have self defense + a gun. But your argument is you're not allowed to use it for your "right" to self defense?

>So you believe that prior to 1788 no right of self-defense existed?

The framers of the constitution believed the bill of rights merely codified natural human rights that have always existed.

>Again, the 2nd only concerns tyranny, and prevents the government from disarming militias in order to have a check on tyranny.

The right to keep and bear arms is ascribed to the people.

In practice, rights are whatever you can get away with. You have the right to travel freely in most public land, but you may be eaten by a bear. But the legal distinction helps in restraining the government, to the point that they acknowledge them. If the government stops acknowledge the right of people to bear arms then you're left with the result those of us that can get away with it will and the rest will be killed or imprisoned.