John Browning’s Auto-5 set the bar for semi-automatic shotguns. The famous “hump back” was made in countless configurations and gauges. It was used by a myriad of hunters for all kinds of wild game.

Of the more than 30 guns John Browning designed, the Auto-5 was one of his most complex to build. In addition to shotguns, Browning developed handguns and rifles, but neither of those firearms are ...