M26 MASS (Modular Accessory Shotgun System)
The M26 MASS is a bolt-action, 12-gauge underbarrel shotgun system adopted by the US military in 2012. Manufactured by Seymour Products, it was designed to be modular and attach to the M4 carbine, offering capabilities from door breaching to CQB operations. It utilizes box magazines and features a reversible charging handle and folding iron sights for compatibility with the M4.






