The 20-gauge gun offers versatility, too, although it doesn’t match the 12 in terms of the heaviest payloads of shot it can handle. Twenty gauges do come with either 2¾- or 3-inch chambers.

Americans have long championed the shotgun as a premier self-defense tool ... the MF20 is a gas-operated, semi-automatic 20 gauge. It features a pistol-grip configuration and a shrouded barrel ...