m26-mass
The M26-MASS (Modular Accessory Shotgun System) is a magazine-fed, straight-pull bolt action 12 gauge underbarrel shotgun, introduced in 2003. It is mainly designed for U.S. military use, to be attached on the M16 and M4 Carbine.
See also
* List of weapons* M26-MASS (Girls' Frontline)