Sure they don't sell bombers and guided missiles, but then if we ever get to that point, there won't be much of a military left for the gov't to use against us, because they are US.
LOL. It is so cute when someone who has never served brings out the "they'll never attack US citizens!!! DERP!" line.
Here's how it goes down. First, the military brass will come up with some disparaging name for the citizens who are the new enemy, just as they did for every other war:
"Haji" is the troops' term of choice for an Iraqi. It's used the way "gook" or "Charlie" was used in Vietnam. "From 'Gook' to 'Raghead'"
Next, the citizens (the bad ones) are depicted as subhuman. (The government will also direct the news to depict the new enemy as dangerous psychopaths, so the average citizen will not join in the revolt.)
Final step: 6-round burst, every time. Change barrels every 10 minutes.