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Borderlands 4 Guide

How to Unlock the Legendary Kaoson SMG

Weapons
Legendary Loot
Map
Updated on Oct 31, 2025
Oct 31, 2025

Overview

The Kaoson is a Legendary Vladof SMG from the unique enemy known as 'Primordial Guardian Origo' in the Terminus Range Vault Encounter.

It shoots a volley of sticky projectile which detonate after either reloading the weapon, or swapping firing modes. The alternate firing mode, is an atlas tracker which allows the player to tag their desired target, making it easy to land shots accurately.

borderlands 4 kaoson smg

How To Get

Unlock Location + Farm Method:

borderlands 4 terminus-range-vault-encounter location

borderlands 4 terminus-range-vault-encounter location

borderlands 4 terminus-range-vault-encounter location

Notes

  • Dropping in Kinetic, Fire, Shock & Cryo, you may find it handy to keep one of each element in your build, so you can match elements effectively to avoid damage drop off

Synergies & Best Builds

The 'Atlas Infinium' Firmware will allow the player to track their target, and land shots on them from any angle until they swap weapons. The Kaoson can use this method very well if done correctly.

  • The Kaoson also works well on builds with high fire rate, due to the vast amount of projectiles it can sink it within a short amount of time.

If you're playing Rafa, you may find use in the skill El Paraguas, which will further buff the stickies fired by the Kaoson

Video

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