It hasn't happened BECAUSE the Second Amendment has been in place. Why do you even give a shit? It's old. Go back and play with your toys and leave these conversations to the adults.
Seriously..
In countries where there is no "Second type of Amendment" has it stopped the people from rising against their government ?
Romanian
http://en.wikipedia.org/wiki/Romanian_Revolution
Philippine
http://en.wikipedia.org/wiki/People_Power_Revolution
You want a list long of them.. Here..
http://en.wikipedia.org/wiki/List_of_revolutions_and_rebellions