The Bill of Rights was written to protect the rights of citizens from a tyrranical government. Nothing more.
Only fools and those who are intellectually dishonest believe that the 2nd Amendment somehow offers states (the government) to keep and bear arms as well as maintain an army. The 2nd Amendment does no such thing.
Those first ten amendments offer no rights to the states. Those rights are afforded to the people. It is baffling how someone could look at the ten and say to themselves,
Wow. Amendments 1, 3, 4, 5, 6, 7, 8, 9 and 10 give rights to the people. Amendment 2 gives rights to the government. Why on earth would the Founding Fathers extend the right to keep and bear arms to the government and not the people?
There's an interesting website, if you want to take the time to read, that provides a montage of all the Founding Fathers and what their opinions were regarding private firearm ownership. Again, it becomes clearly obvious that the right to keep and bear arms was intended for individual citizens, not for a state-run militia.
See
http://www.eskimo.com/~bpentium/articles/guns.html for website mentioned.
Jeff