Last time I can remember an actual, honest to god attempt by just people, with no state assistance, to overthrow the government happened in 1786/87. The fighters were armed with the same weapons as the states.
The MILITIA that was necessary for the security of the Free State was called out to stop it.
And they succeeded in stopping it quickly, leading to not only the complete disintegration of gun nuts wet dreams of today, but also led to the far more federal centric government we have today.
What happens when the elected government gets tired of threats post Shays Rebellion
http://en.wikipedia....iskey_Rebellion - at least they fought over booze and not guns.
In effect, people deciding to get their guns and go after the government for perceived injustices ended up in helping the government attain more power with the publics backing, and instead of anarchy based on people being nuts, we became the greatest nation in the history of the world.
No one brought up an overthrow of anything.
The second amendment is supposed to prevent that scenario from ever going too far in the first place. It is to defend Liberty, not to attack anyone.