Knight’s Armament Corp. “KAC” Master Key w/ mount.
The12-guage Master key can be mounted under standard rifles as a breaching tool.
It is also mountable to KAC’s Standalone Module. The system consists of a Remington 870 shotgun that can be mounted onto an M4 rifle in an under-barrel configuration. The shotgun has a 3 round capacity and should be only operated when attached to a host rifle or the standalone module. Exclusively for military and law enforcement.
Rifle Sold Seperate.