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M26 Modular Accessory Shotgun System

Military technology

The M26 Modular Accessory Shotgun System (MASS) is a developmental under-barrel shotgun attachment for the M16/M4 family of United States military firearms. It can also be fitted with a pistol grip and collapsible stock to act as a stand-alone weapon. It is replacing the current M500 shotguns in service.

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