You can’t fight the government with an AR-15, and why would you want to fight the government anyway? From Ryan McMaken at mises.org:
There are two fundamental arguments most commonly made against gun control.
The Anti-Crime Argument
The first one is based on the idea that persons have a fundamental right to self-defense against ordinary criminals. That is, in a world where criminals have access to either legal or illegal weapons, ordinary people ought to be able to arm themselves for purposes of self defense.
The benefits of private gun ownership in this regard can be illustrated in a variety of ways. Mexico’s strict gun-control regime, for instance, ensures ordinary Mexicans are at the mercy of the cartels and ordinary street criminals. Mexico’s astoundingly high homicide rates illustrate the unfortunate reality.
Moreover, within the United States, some of the worst regions for homicides are areas with some of the most strict gun control laws. Baltimore, for example, has a homicide rate ten times that of the United States overall, while the state of Maryland heavily restricts gun ownership.
Studies that assert “more guns means more crime,” meanwhile, have never been able to demonstrate a causal relationship here. Not only is there no reliable data on where exactly all the guns are, but the direction of causality can go either way. We would expect people living in a high crime area to be more likely to purchase a gun for protection. In other words, the proper conclusion may just as likely be “more crime means more guns.”
The gun-for-self-defense argument is the easier one to make. For the most part, one need only argue that people need to be at least as well armed as ordinary criminals. Shotguns and rifles for home defense, or conceal-carry of handguns, for instance, would arguably be sufficient.1
