}}
The '''C-More M26 MASSKAC Masterkey''' (also known as the '''M26 MASS''', the '''MASS''' or simply the '''M26Masterkey''') is a [[12 gauge]] underbarrel shotgun. MASS stands for Modular Accessory Shotgun System. It is notable for being fed using detachable box magazines, and can be mounted on every weapon compatible with the [[M203]].
== Compatibility ==