Borderlands 3 FL4K King's Call Level 53 Boss Build Guide

To execute FL4K's King's Call build at Level 53 in Borderlands 3, pair the King's Call legendary pistol with critical-hit skill nodes in the Hunter tree. The King's Call pistol returns critical hits directly to your magazine while spawning additional projectiles. Maintaining precise aim against large or stationary bosses creates a continuous fire loop that bypasses standard reload penalties.

Skill Tree Point Allocation

To maintain magazine refunds and peak damage output, prioritize points in the Hunter tree while picking up key Master tree skills for pet utility and damage scaling.

Focus on these essential passive skills:

• Leave No Trace: Adds ammo directly to your magazine when landing critical hits. This reinforces the weapon's built-in refund mechanic.
• The Most Dangerous Game: Provides a temporary buff to gun damage and critical hit damage after killing high-level targets.
• Megavore: Gives FL4K a chance to land critical hits on any part of an enemy body. This keeps your ammo loop active even when a boss moves.

At Level 53, skill points are limited. Avoid spreading points into low-impact nodes in the Stalker tree unless you require specific survival passives to sustain through one-hit boss mechanics.

Gear and Artifact Selection

Complement the King's Call pistol by selecting Class Mods and Artifacts with stats that scale your critical damage and skill availability.

Managing Combat Weaknesses

The King's Call is specialized for single-target boss encounters. Its projectiles move slowly and require high accuracy. Missing shots triggers manual reloads, which severely lowers your sustained damage output. The weapon struggles in cramped environments or against fast-moving minion swarms.

Follow these steps to cover weapon limitations during boss fights:

1. Reserve the King's Call for stationary or large-hitbox bosses.
2. Slot an area-of-effect SMG or assault rifle as a secondary weapon.
3. Swap to your secondary weapon to clear small enemies quickly, then switch back to the King's Call when the main boss is vulnerable.