When the U.S. Marine Corps needed a new and more lethal combat shotgun, Benelli answered the call with their new gas-operated M4. Combining ruthless efficiency, shot versatility, and signature Benelli reliability, the M4 distinguished itself from the competition, and was chosen as the Joint Service Combat Shotgun. This model is the civilian version, with a shortened 5-round tube and fixed stock. Everything else is identical, from the exceptional ARGO (Auto-Regulated Gas-Operated) gas system to the near-bulletproof build quality. If you want the best military-tactical shotgun in the world, your search begins and end with the Benelli M4.