Shotgun (attachment)

The KAC Masterkey Shotgun is a weapon attachment in Call of Duty: Modern Warfare 2. It is an under-barrel pump-action shotgun based on the Remington 870 developed originally for the M16 assault rifle. It is attached under the barrel of a weapon in a similar manner to the Grenade Launchers of Call of duty 4. The military is replacing their Masterkey shotguns with the newer M26 MASS, a small pump-action shotgun with a seven-round detachable magazine.

It was first confirmed in the first leaked video of Takedown when it was seen as a pickup icon on a FAL. It will probably be an upgrade for some assault rifles. It has confirmed compatability with the AK-47, F2000, M4 carbine and FAL.

Trivia

 * In real life it is used more for door-breaching than actual combat (hence the weapon's name). Special zinc door-breaching rounds are required for this purpose.