Detached Masterkey

The Masterkey is a door breaching shotgun system manufactured by Knight's Armament Company. The Masterkey project was initiated during the 1980s to provide assault rifles with a potent built-in door breaching tool. Individual soldiers were often forced to carry a breaching shotgun in addition to their standard issue rifle, but the Masterkey removes this need. The system consists of a Remington 870 12 gauge pump-action shotgun mounted on a M16 or M4 assault rifle in an underbarrel configuration, much like the M203 grenade launcher. It has a 3-round internal magazine and can carry a fourth round in the chamber.

Army of TwoEdit

The Masterkey is available as the second-tier front mount for assault rifles during customization. It deals high damage, but is only effective at close range.

Cost: $12,500

Ammo capacity: 4

The 40th DayEdit

The Masterkey returns as a front mount attachment available on assault rifles. It is also available for the MK Grenade Launcher.

Cost: $8,500

Ammo capacity: 4

A variant is also built into the AS-KR1, which has an 8-round drum magazine.

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