Gametitle-FO4 NW
Gametitle-FO4 NW

Aeternus is a unique weapon in the Fallout 4 add-on Nuka-World.


Aeternus is a unique Gatling laser that bears the "Never Ending" legendary effect.

Although it uses the "Never Ending" effect, its actual effect gives the weapon true unlimited ammo. It will use a portion of a fusion core when first fired, but the core's charge will not decrease again while using Aeternus.



Carried by the rogue knight during the quest Amoral Combat. The quest must be repeated until the rogue knight is the challenger. Upon their defeat, they will drop Aeternus.

Related questEdit


If the user has one or two fusion cores in the inventory, Aeternus will fire off 1 or 2 rounds before fully depleting the cores. If one has at least three fusion cores, the fresh loaded weapon will use a seemingly random portion of one fusion core before reaching "unlimited ammunition." This is valid up until one loads a new fusion core either by equipping another weapon, modifying the Aeternus in a weapons workbench, or increasing the amount of fusion cores in ones inventory.

Behind the scenesEdit

The weapon's name is from the Latin language, meaning "eternal" or "immortal."


  • pcIcon pc ps4Icon ps4 xboxoneIcon xboxone It seems to be irregular in consuming ammo. Sometimes draining a fusion core entirely in the first shots, or firing only as many shots as the player has fusion cores and then removing one core entirely. [verified]
  • pcIcon pc Used cores randomly deplete to under 10 power then switch to a new core. As the ammo counter shows how many cores one has this is misleading as it gives the appearance of having infinite cores, until one sees all their cores have anywhere from 3-9 uses left. [verified]