Unstable Kor
Updated: Jun 05, 2026
Borderlands 4

Borderlands 4Unstable Kor

It's building up, building up, building deep inside.
  • Content
    Vault of the Damned
  • Weapon Type
    Shotgun
  • Rarity
    Legendary
  • Manufacturer
    Torgue
  • Elements
    Kinetic
    Fire
    Shock
    Corrosive
    Cryo
    Radiation

Unstable KorAll Details

God Roll
Unstable Kor (Shotgun-BL4)
Copy Unstable Kor Code
About
Variants
Parts
Changelog

Unstable Kor - About

The Legendary Shotgun Unstable Kor is manufactured by Torgue and comes from the Borderlands 4 Vault of the DamnedDLC.

Unstable Kor - Unique Ability

Full Belly - Detonating Stickies triggers a Nova. Nova Damage scales with the number of attached Stickies.

Unstable Kor - Variants

  • Elements
    Kinetic
    Fire
    Shock
    Corrosive
    Cryo
    Radiation
  • Listed Projectiles
  • Shot Cost
  • Weapon Parts
    variants
    fixed parts
  • Firmware
    possible
    none
  • Splash Anoints
    possible
    none

Unstable Kor - Shotgun Parts

Weapons usually get one part per group, but sometimes multiple or none. Numbers in the top-right  indicate the range of parts a group can have.
Parts usually have equal drop chances, or it's indicated nearby.

Unstable Kor - Changelog

Update: May. 07, 2026

  • Increased Damage by +45%
  • Increased Fire Rate by +50%

Update: Apr. 30, 2026

  • Nova Damage gets stronger for every sticky projectile you've attached to an enemy.

Unstable KorHow to get it?

Vault of the DamnedDLC
General Farming Guidance

To collect and equip the Legendary Unstable Kor, you need to own the BL4 Vault of the DamnedDLC.

Vault of the Damned items in Borderlands 4 can only come from dedicated source or the exclusive DLC World Pool. Here’s your quick start guide:

Farming Preparations

  1. Identify the Best Source: The Sources below are generally ranked from best to worst. Make sure to complete any required quests and be aware of Source Restrictions.
  2. Locate the Source: Make sure you have unlocked the Location.
  3. Equip Your Character: Equip your character to easily overcome enemies.
  4. Set Spawn Point: Locate the nearest Save Station to use as your spawn point.

Bonus Tips

  • Combine Runs: Get more loot per run by integrating nearby sources into your farming route.
  • Track Progress: Track your runs to more precisely predict drops and more clearly monitor progress. Additionally, time your runs to see how tweaks affect your farming efficiency.
  • Speed it up: Explore shortcuts and boost your movement speed to minimize travel time. Also, aim to shorten your time to kill with higher DPS or big damage bursts.
  • Realistic Expectations: Be patient and persistent when farming. Despite precise, verified drop rates, your actual runs might exceed or fall short of inferred expectations.

Unstable KorDrop Rates

  • Nightmare Rift Boss
    9%
Bonus Chance: +2% × UVH
Phosphene: 0.3% + 0.1% × UVH
Big Encore: 30%, Phosphene: 1.5%

Unstable KorAll Sources

Nightmare Rift
mini-boss

Nightmare Rift

Mini-Boss
DLC 1 Wide