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Borderlands 4 Guide

How to Unlock the Legendary Lucian's Flank Assault Rifle

Weapons
Legendary Loot
Updated on Sep 16, 2025
Sep 16, 2025

Overview

Lucian's Flank is an impressively-fast Assault Rifle, making it useful for builds that can take advantage of its high Fire Rate. Its unique effect also allows it to refill its own Ammo whenever you Crit.

However, do note that it has an internal Cooldown, meaning it can't continuously fire non-stop. Regardless, it's still a great option for its speed and capacity.

borderlands 4 lucian's flank assault rifle

How to Unlock

Unlock Location:

  • Progress through the Terminus Range region, heading south where it borders the Fadefields.
  • Unlock the Old Scrape Drill Site, where Saddleback resides as the boss.

borderlands 4 meathead riders location

Farm Method:

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