Updated: Jun 05, 2026

Borderlands 4Swarm

Extragalactic jaws, clamping from above and below...

Content
Base Game
Ordnance Type
Grenade
Rarity
Legendary
Manufacturer
Order
Elements

SwarmAll Details

Copy Swarm Code

Swarm - About

The Legendary Ordnance Swarm is manufactured by Order and comes from the Borderlands 4 Base Game.

Swarm - Unique Ability

When The Swarm is thrown in an arcing trajectory, it bounces off surfaces while homing in on an enemy.
On enemy impact, it deals 100% Kinetic Splash Ordnance Damage and spawns 3 homing child grenades.
On impact, each child grenade deals 50% Kinetic Splash Ordnance Damage and spawns 3 additional homing child grenades.
The final set of 9 child grenades each deal 25% Kinetic Splash Ordnance Damage.

Swarm - Variants

Elements
Ordnance Parts
variations
fixed parts
Firmware
possible
none

Swarm - Stat Augments

All Stat Augments are equally common, giving each Augment a 11.1% Chance (1 in 9) to appear.

Bloodthirsty +17% Grenade Lifesteal
Concussive +83% Knockback Force
Exacting +25% Crit Chance
Expansive +41% Radius
Explosive +21% Damage
Express -21% Cooldown
Nuke +31% Damage
+62% Radius
+25% Cooldown
Overflow +1 Charge
Wideload +62% Radius
-33% Homing Turn Rate

Swarm - Changelog

SwarmHow to get it?

Base Game
General Farming Guidance

To collect and equip the Legendary Swarm, you need to own the BL4 Base Game.

Base Game Items in Borderlands 4 are often obtainable from many sources, including those in DLCs. Here’s your quick start guide:

Farming Preparations

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.
Locate the Source: Make sure you have unlocked the Location.
Equip Your Character: Equip your character to easily overcome enemies.
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.