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Borderlands 4 Guide

How to Unlock The Legendary Duper Heavy Ordnance

Weapons
Ordnance
By Ventu_Mortis
Updated on Jun 25, 2026
Jun 25, 2026

Overview

Duper is a Maliwan Heavy Weapon

Its special effect is called Holo-Barrel - Shoots holographic barrels that pierce enemies and attach to the world. Shooting attached barrels causes it to explode, dealing damage.


How to Unlock

Unlock Location:

  • Progress through the (A Zane to Kill For) DLC until reaching the Boss CL34n.R
  • You will find CL34n.R in far Bottom Left of the map.

Farm Method:

  • Defeat CL34n.R to get a chance at the Duper.
  • After use the Encore Machine nearby to reset the fight.
  • Repeatedly defeat CL34n.R until the Duper drops.

Table of Contents

1. Overview2. How to Unlock

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