I'm getting rather upset by so much misinformation on the interwebz about gun laws in France. I realise Americans love their firearms and consider their possession to be the solution of all problems (though the USA seem to be marching down the cliff together with the rest of the West), but in my opinion, one should always first inform himself on the matter before making statements on the net.
The possession of firearms is NOT prohibited in France, it's regulated. Fully automatic weapons are prohibited, semiautomatics including handguns are subject to licensing, other types of firearms should be registered while historical firearms (according to this site it includes revolvers, while that one denies it) are free for everyone. It's really not that difficult to acquire a license and according to the Dutch site I've linked above many stores don't even ask for it. (More on gun laws in France here and here).
While I'm not sure where they stand on concealed carry, the truth is that people in Europe usually don't take weapons with them while attending a hard rock concert or drinking a beer in a cafe because it's generally safe over here, outside of certain neighbourhoods (though it's becoming less so). People purchase guns to protects their homes and other property (shops) from burglary, they don't go through the day planning on participating in a firefight with terrorists (which may change very soon, unfortunately).
There is really little excuse for so much ignorance in the age of broadband:)