“To suppose arms in the hands of citizens, to be used at individual discretion, except in private self-defense, or by partial orders of towns, countries or districts of a state, is to demolish every constitution, and lay the laws prostrate, so that liberty can be enjoyed by no man; it is a dissolution of the government.” —John Adams
I suspect you are misinterpreting that statement, probably because it is long and complex. Here it is along with quotes from many other Founders and wise men of that age in support of the right of the people to keep and bear arms:
http://www.gmu.edu/departments/economics/wew/quotes/arms.html
Coming from the George Mason Economics Department, I suspect Dr. Walter Williams might have played a role in this page being composed on that website. I don’t know if that’s so, but I imagine it.