9-Bang

The 9-Bang grenade is a throwable concussion device in Call of Duty: Modern Warfare 3.

Call of Duty: Modern Warfare 3
The device is similar to the flashbang from previous Modern Warfare titles; however, after the first explosion, another eight detonations occur in fast succession, hence the name "9-Bang." It is only used by Delta Force during the campaign. 9-Bangs are first usable in the mission "Black Tuesday", where Sandman orders the player to use them on multiple occasions. They are also usable in the missions; "Hunter Killer", "Bag and Drag", "Iron Lady", and "Scorched Earth".

Trivia

 * They do not appear in Multiplayer, instead the regular Flashbang grenade is used.