Many retailers offer exclusive DLC for pre-ordering games before release. One of the pre-order bonuses offered by Gamestop is a exclusive multiplayer map and the Super M90 Shotgun for the game, which has also confirmed co-op multiplayer for the title. Description for the shotgun reveals “This weapon can be used exclusively for multiplayer co-op missions.”
Gamestop Description:
Super M90 Shotgun – An extremely high quality, versatile and powerful weapon, the Super M90 is preferred tactical shotgun among the U.S. NAVY SEALs since 1999. This 12-gauge shotgun is equipped with slug ammunition for serious stopping power. It inflicts heavy damage in a focused area and features a greater effective range than standard shotguns. This weapon can be used exclusively for multiplayer co-op missions