Maybe I'm way off base, but I think it's clear by this point that the only real reason to own an AR-15 or similar weapon is in case "they" come for you. Whether "they" means zombies, a foreign invading army, other people coming to take your stuff when society collapses, or the government is dependent on the person, but it's for killing people (assuming we can still call zombies people). Right? I mean, is there some other legitimate concern that's addressed by these that I'm missing?
*I like guns. I own guns. I'm not in favor of banning guns.