Masterkey

The Masterkey is a door breaching shotgun system manufactured by Knight's Armament Company.

Insurgency: Sandstorm[]

"Underbarrel tube-fed pump-action shotgun that uses standard buchshot shells."
— In-game description

The Masterkey is a underbarrel shotgun attachment featured in Insurgency: Sandstorm.

[Edit] Weapon Attachments of Insurgency: Sandstorm
Optics	1x: 1x Flip Up Sights • 1x Holographic • 1x Kobra • 1x OKP-7 • 1x Red Dot • 1x MRO • 1x MARS • 1x Mini Green Dot • 1x Mini Red Dot 1.5x: 1.5x PK-AS 1.5x-1x: 1.5x-1x A1 Scope • 1.5x-1x CH Sight 2x-1x: 2x-1x Kobra • 2x-1x MARS • 2x-1x OKP-7 • 2x-1x Red Dot • 2x-1x Holographic 2.5x: 2.5x CT Scope 2.5x-1x: 2.5x-1x M1C Scope 3x: 3x A3 Scope • 3x Type 03 Scope • 3x YMA95-1 Scope 4x: 4x PU Scope • 4x PSO-1 • 4x M150 3x-1x: 3x-1x CH Sight BUS 4x-1x: 4x-1x C79 • 4x-1x SU230 • 4x-1x M150 BUS • 4x-1x SU230 BUS • 4x-1x Type 11 Scope 6x-3x: 6x-3x Red Ring Scope • 6x-3x T Scope • 6x-3x DOS Scope 7x: 7x Hunting Scope • 7x Sniper Scope • 7x Type 99 Scope
Chamber	Greased Bolt
Underbarrel	Smoke Launcher • Bipod • Explosive Launcher • Quick Draw Grip • Loading Grip • Aiming Grip • Recoil Grip • Recoil Grip Bipod
Barrel	Flash Hider • Compensator • Suppressor • Cheapo Suppressor • Sniper Barrel • Suppressed Sniper Barrel
Magazine	Extended Magazine • Drum Magazine • Stripper Clip • Speed Loader
Siderail	Laser Sight
Ammo	Flechette Rounds • Slug Rounds • Tracer Rounds
Stock	Quick Draw Holster