Henry Repeating Arms Single Shot, 20 Gauge, 3 Chamber, 26 Round Barrel, Brass Finish, Walnut Stock, Bead Sight H015B-20 Whether you like the simple operation, the reliable action, the nostalgia factor of hunting with a one-shot shotgun, or the uncomplicated first-gun introduction for a new shotgunner, Henry built this shotgun for a wide variety of shooters.