In your reading, guns used to be able to preserve liberty, but now they're irrelevant because the state security forces can just brutally crush any resistance with their superior firepower? That's not good rhetoric, and it's not even true! Just look at the success all those tanks and airplanes and trillions of dollars had in Afghanistan, for example. I also disagree with the finer points of "guns means freedom", but I don't think yours is a valid argument.