When it comes to shotguns for home defense, law enforcement, military and tactical use, few companies have a better handle on that market than Mossberg. The venerable 500 is a staple of LEOs everywhere, and the company’s semi-auto 930 holds its own as well. The company’s newest offering in the tactical space, the 940 Pro Tactical, represents the next generation of performance tactical shotguns from a company with a rock-solid reputation.

In March, I traveled to Gunsite...