Tags: Weapon.
This article is about a shotgun. For the security key see master key.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.
