M26-MASS-M1 - Modular Accessory Shotgun System

The M26 is a manually operated, shoulder fired light weight shotgun system weighing 3 pounds, designed to attach to the M4 carbine by mounting under-barrel with a quick detach mounting system. It can also be used in a stand alone configuration by attaching the collapsible stock assembly. The M26 is magazine fed and fires all available 12 Gauge munitions including breaching and less lethal. The M26 uses the host weapons sighting system and is adjustable for windage and elevation, while also providing an integral stand-off device and ambidextrous operation.  


  • Multi-shot 12 gauge shotgun, 3" chamber
  • Operation: Straight-Pull Bolt-Action 
  • Capacity: 3 or 5 Round Detachable Magazine
  • Attached under the barrel of the M4 carbine
  • Air cooled, and manually operated
  • Stand-Alone configuration with integral fold up iron sights
  • Utilizes M4 sighting system when mounted under the barrel
  • Retractable accessory stand-off device for ballistic breaching
  • Integral M1913 rail
  • Safety and Charging Handle are reversible for ambidextrous operation

Are M26 shotguns considered short barrel shotguns?

Some are and some are not. The M26 MASS and M26 CMCS models have a 7.75 inch barrel and are designated as a SBS (Short Barrel Shotgun / Title 2 Firearm). The M26 PDW model has a barrel length of 3.25 inches but because it has a pistol grip and no butt stock it is designated as an AOW (Any Other Weapon / Title 2 Firearm). The M26 CMC model has an 18.25" barrel and is designated as a standard Shotgun (Title 1 Firearm).

Are M26 shotguns a title 1 or title 2 firearm?

It depends on the model. The M26 CMC is a title 1 standard shotgun with an 18 inch barrel. All of the other M26 models have a barrel length less than 18 inches and are title 2 (NFA Class 3) firearms. 

How can I purchase an M26 shotgun?

As a firearms manufacturer, we do not sell direct to consumers, therefore you will need to contact a SOT firearms dealer in your state that can process transfers of title 2 / NFA class III firearms. The dealer will advise if the M26 is legal for consumers to own in your state, require that you complete a background check, and process your application for transfer with the Bureau of Alcohol, Tobacco, and Firearms (BATF). If approved, the dealer will then provide the necessary information to us to submit a Form 3 transfer to BATF for the transfer of the M26 to the dealer. This process can take 2 months or more to complete.

To purchase the M26-CMC standard Shotgun, you can contact a standard title 1 FFL Dealer in your state to process your background check and transfer.