Since 1998, the Benelli M4's ARGO dual piston system has delivered rock solid reliability in any environment. Built for modularity with a Picatinny rail, ghost ring sights, and a pistol grip stock, the M4 is the go to combat shotgun for operators who demand adaptability and dependability.The Benelli M4 EXT gives you everything you love about the M4-and more. The telescoping stock allows you to customize your length of pull in a flash. The EXT model features extended capacity as well as a new bolt release built for speed. FeaturesExtended 7+1 CapacityNew, Enlarged Bolt ReleaseTelescoping Stock