This is the second most powerful shotgun in the game, and kills people in 1 shot at short to medium range. Like the AS14 Hammer, it is a rapid fire shotgun, but has slightly less refire delay making it the fastest firing shotgun in the game. It has the greatest range of any shotgun, and the second greatest damage per shot at short range, just behind the Pimp Cane. However, it has the highest spread of all shotguns (tied with the AS14 Hammer), limiting its effective range. While the Pimp Cane deals more damage per shot, the XS-2 Ultimax dishes out the highest damage per second out of all shotguns.
The XS-2 is unlocked in the Weapons Cache after completing level 3 of the Drug Trafficking activity at Wardill Airport. It is never available from Friendly Fire, but ammunition is available there, since it uses normal shotgun ammo.
- The Cheat for this weapon is #958.
- XS is a pun on the word 'excess', referencing the destructive capability of this weapon, although it is not the most powerful weapon, it just has a high rate of fire.
- The XS-2 Ultimax shares some similaries with the Tombstone.
- The buttstock of the XS-2 Ultimax resembles that of the Benelli_M4, a successor to the Benelli M3 (Tombstone) in real life. While the magazine resembles the Magazine from the Striker and AA-12 Shotguns. Unlike the XS-2, the M4 is a semi-automatic, magazine tube-fed shotgun.
- The sight resembles either an ITL Mars sight or an EOTech Holographic Sight, and is mounted just above the Magazine, obstructing the iron sights.