The ARK (also spelled Ark) is an alien artifact that can be found in the Extinction maps "Awakening" and "Exodus". It can be equipped as a barrel attachment which can transform player weapons into "laser weapons", though it still uses conventional ammunition and also has the additional effect of causing extra damage to cryptids, and makes any that are killed with the weapon it's attached to explode in a similar fashion as to the Pipe Bombs. Due to the enhanced damage and range per shot, the ARK is one of the most valuable attachments on offer.
It is found randomly in hidden rooms around the map and mounted on a dead soldier's unusable Ameli. Only one can be found randomly in each area (except in the last area which contains two) so a total of four ARK's can be found and attached per match.
A large number of weapons that can equip the Ark experience a modification to the sound that the weapon makes when firing, similar to that of a silencer. There are some weapons that do not experience this, such as the L115, MR-28 and IA-2, among others.
It replaces the Muzzle Brake if there is one attached to the firearm. However, unlike barrel attachments in other game modes, the ARK (as well as the Muzzle Brake in Awakening) can be used on weapons that have an integrated silencer.
The Nemesis DLC added a Teeth upgrade that makes the ARK available to handguns as well; it replaces the Muzzle Brake on the player's upgraded handgun. It also added Master Scavenger, an upgrade that allows the player to scavenge the ARK from Search Piles in all maps.
The ARK can be attached to all weapons available in Extinction, except launchers and specials. It was also ineligible on the Honey Badger, but that weapon was removed on all maps it was available on in an update.
- Like a Glove (30 /Bronze Trophy ) - Kill five Cryptids with the Ark attached to every compatible weapon on Regular or Hardcore difficulty.