Dex, people "with guns" have been whining about the government and planning to "take back the nation" since the days of the Civil War.
Research groups that actually tried to build up the gumption to act out on their shenanigans, like the Montana Militia, (for example), and you'll find that even they've mellowed out over the last ten years to a point where their content to sit around the proverbial campfire, polishing their guns and talking about what they'll do when the New World Order arises. It's like watching a group of kids talk about the latest pokemon game.
Currently, there are no armed groups awaiting some magic tipping point to where they will sweep out into the streets and rise up.
It's an interesting point of growth in regards to sociology and culture. When people are, for the most part, content with the status qua, (ie. food, shelter, religious/political freedoms, etc.), it's easy to sit around and boast about how times they is a'changing and one day... one day, you'll just act up.
Most folks don't want to do that because it would ultimately mean disrupting their existing standard of living.
Hence why most of what you've seen in the news over the last few years as examples of radical action, is just that. Rare exemptions pushed to excuse or justify their actions that are already bordering on counter to society to begin with.
I'm amused that you apparently seem to have this fear that half the country is going to magically take up firearms against the government.