Actually that is not true the bit about the Nazis banning firearms
http://www.straightdope.com/columns/...-gun-ownership
The whole problem I have with the argument that gun ownership somehow prevents tyranny is the many regions of the world in which there are no restrictions of firearms (Somalia and Afghanistan are two excellent examples) where warlords roam around at free will imposing their will on everyone else. It is a very weak argument I my opinion if you are pro-firearm.
In Iraq under Saddam there where few regulations on gun ownership yet he stayed in power and the majority of Iraqi citizens never openly resisted. The firearms restrictions ironically enough did not occur in Iraq until the US was present there.