“Guess what? A shotgun will keep you a lot safer, a double-barreled shotgun, than the assault weapon in somebody’s hands [who] doesn’t know how to use it, even one who does know how to use it,” Biden said. "It’s harder to use an assault weapon to hit something than it is a shotgun. You want to keep people away in an earthquake? Buy some shotgun shells.”
Biden doesn't claim to be a ballistics or weapons professional, but experts (here and here) say to carefully choose a self-defense weapon based on what you're comfortable with while keeping in mind your surroundings and situation.
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