It's not the guns that enable the revolution, in my mind. It helps people protect themselves while it happens. Revolutions happen in countries with low gun ownership, also. Once people get it in their mind that the power structure is breaking down, it's kind of over. Unless you have an ethnic war, who are you gonna shoot anyways? The National Guard that's pulled from your same town? I just don't think that soldiers would obey orders to engage in firefights with civilians for very long. It's hard enough to get them to do that when the entire population is foreign and shitty.

I don't think you shoot your way out of tyranny. You organize your way out. Guns are still very useful. For instance, if the military did start shooting at people, shooting back would dissuade them. It's not that you win militarily. Just reduce their will to fight the war, which I'm guessing is already pretty low. And of course revolution is accompanied by all kinds of anarchy.