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Borderlands 4 Guide

How to Unlock the Legendary Firewerks Armor Shield

Shields
Legendary Loot
Updated on Sep 19, 2025
Sep 19, 2025

Overview

Firewerks is an exciting Shield that fires off a barrage of homing missiles whenever you kill an enemy. This unique effect makes it generically useful, no matter what build you're playing.

Best of all, this Legendary Shield is accessible very early on, meaning you even have the chance to acquire it during the initial hours of your campaign play-through.

borderlands 4 firewerks armor shield

How to Unlock

Unlock Location:

  • Progress through the story until reaching the very south of the Fadefields area.
  • You will encounter Splashzone, the first major campaign boss after the tutorial.

borderlands 4 splashzone location

Farm Method:

  • Defeat Splashzone in the south of Fadefields.
  • After completing the story mission, return to his arena.
  • Use the Encore Machine nearby to reset the fight.
  • Repeatedly defeat Splashzone until Firewerks drops.

Synergies & Best Builds

The Firewerks Bundled effect triggers On Kill, giving it amazing synergy with Kill Skills.

  • Amon's Gathering Storm and Vital Organs can create incredible ramping damage
  • Minion builds for Vex often rely on Kill Skills such as Grave Assault, Grave Fiends, and Wither

In addition, the Absorb effect can replenish ammo making it underrated for Rafa and his Bullet-Buddy Deluxe and sometimes enabling Vitriol and First Impression.

More generically, it helps increase uptime for Gun-based builds.

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