In my opinion, as far as "rallying" goes, it has to do with convincing a population that they have nothing left to lose.
In America, as wealthy as it is, that could be a nearly impossible task. It could be even more difficult when one understands that those that are willing to exert effort toward the retention of the Second have enough money to have a house, a family, food, and clothing, at which point, they will finally buy and own guns.
I say "nothing left to lose" in the sense that RKBA must be understood as a requisite for freedom. While I've lived my life as a bleeding-heart, democratic, utilitarian, "most good for the most number of people" type of spirit, I retain the idea that the Second is to resist tyranny. Personal tyranny. But what happens when your pursuit of happiness entails an illegality?
I've had to prioritize my rights in accordance with my personal philosophies, which should be an illegality of the governments in the first place, but I feel that the Second should be, and is in fact MEANT to be left alone. Ignored and left as written. As said, the beauty of the Second is that it can be ignored until it becomes necessary (Franklin?). My rights don't mean a damned thing if I can't protect them, and if my rights to protect them via the law are taken, I need a tangible and effective way to protect my right to not be murdered by my government for doing nothing wrong. I'm pretty sure that that could be described as tyranny.
It is incredibly simple, Mr. Gov't: Respect the understanding that our guns are in our homes in case the government does something that they know beforehand, is inherently wrong. The True American Citizen's Firearm won't be used except to preserve our lives first and foremost, our inalienable rights as humans and children of God second, and lastly, to provide ourselves with a means for survival, and a vessel for our pursuit of happiness.