The USAS-12 is a shotgun in 007: Legends. It has a 12 round magazine.
The USAS-12 is a gas-operated, selective-fire weapon which is designed to provide sustained firepower in close-combat scenarios. It accepts detachable 10-round box magazines or 20-round drum magazines. Both types of magazine are made of polymer, and drum magazines have their rear side made from translucent polymer for quick determination of the number of shot shells left. It has an effective range of 40 m.
The weapon can be used as a secondary weapon when killing one of Sanchez's men in the Licence to Kill mission. All perks are available to attach to the weapon. That's if the player has enough XP points to spend of course. It is readily available for selection in multiplayer or local pay up to four players.