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Borderlands 4 Build

Alt Fuego Rafa

End Game
Leveling
presentationRafa
presentationPeacebreaker Cannons
Updated on Nov 24, 2025
Nov 24, 2025

Build Overview

THE BEST ALT-FIRE SPAM BUILD!

SaveFile

Ever get annoyed by the alt fire cooldown? Well this build solve that!

In this build we are taking advantage of the fact that, when using Bullet-Buddy Deluxe with an Alt-Fire Gun, we are able to get a lot of action skill retriggers.

Meaning we are getting consistent Metal Management, which basically gives us infinite Alt-Fire Ammo.

Strengths And Weaknesses

  • Big Damage
  • Spamability
  • Fun Gameplay (Barely any skill needed)
  • Fast Paced

Skill Tree

Points Spent 0 / 49
LMB Allocate
RMB Unallocate
Peacebreaker Cannons
5/5
5/5
5/5
5/5
5/5
1/1
  • Shield Barriest is great with amp shields


  • Barrage and Temerario are great for our damage formula (and are enough so we can ignore any other damage skills)


  • Brain Dump instead of El Soldado because their bonuses are similar in value but Brain Dump allows us to proc Juerga.


  • If you don't have Soltado from your Dancer COM, take 1 point from Brain Dump and put it in Soltado

Equipment

Weapons
Repkit & Ordnance
Utilities

GUNS:

  • Order AR's Kill Drone Alt-Fire - Insanely fun for mobbing (you don't have to aim and the drone do the whole killing for you), Also really good at Bossing. (Best option for the build overall)


  • Jakobs Shotgun's Spread Launcher - Extremely high base damage, is the best bossing option


  • Maliwan AR's Beam Tosser, similar to Spread Launcher (High Base Damage) but with elements


  • Death Sphere, Ordnite Spike, Attack Drone are all great option but they are one tier lower than the thing mentioned above.


  • Note that conventional "Alt-Fires" like stickies, elements switch, daedalus,.. doesn't work with this build


ORDNANCES:

  • Any grenade that has lifesteal is great.

COMS:

  • Dancer with 1 point into Soltado and as much point into Temerario as possible

SHIELDS:

ENHANCEMENT:

Very much depend on your gun

  • It's better to focus more on the passives like Gun Damage, Gun Type Damage, Gun Splash, Gun Equip Speed.
  • Head Ringer Enhancement is great if your gun has a torgue part.

REPKIT:

Firmware

Repkit & Ordnance
Repkit FirmwareHigh Caliber
Ordnance FirmwareHigh Caliber
Utilities
Class Mod FirmwareDaed-dy O
Shield FirmwareDaed-dy O
Enhancement FirmwareDaed-dy O

The listed Firmwares are the must have for this build:

2/3 High Caliber gives us 10% Enhancement Gun Damage (multiplicative with soup)

3/3 Daed-dy O gives us 20% Enhancement Gun Damage, make sure to switch your mode

Specialization

Specialization 1Riddle You This
Specialization 2Now With Caffeine
Specialization 3Bullet Train
Specialization 4Groundbreaker

Riddle You This - a lot of gun soup

Bullet Train - good gun QOL

Now With Caffeine - Best way to get Action Skill Sooldown on Rafa, make sure to pair this with Triple Bypass

Groundbreaker - To finish bosses off


Try to get Now With Caffeine as fast as possible

Avoid the tree that gives you Max Health and Shield.

Gameplay

BOSSING and Mobbing:

Activate Peacebreaker Cannons

Make sure to be in the Alt-Fire Mode

Retrigger your action skill (Activate Bullet-Buddy Deluxe)

Hold down the shoot button

Keep spaming Bullet-Buddy Deluxe retriggers while holding the shoot button

Notes:

  • Only shoot your alt-fire when mental mangement is active (otherwise you will have to wait)
  • Make sure you are always in the correct mode (the alt-fire) otherwise the Bullet-Buddy Deluxe tech won't work (the gun mode sometimes switches randomly, not often in this build, though.)
  • Try to mannually switch mode back and forth every 5s for Daed-dy O(this isn't needed but it's a choice if you truly want to min max your damage)

Changelog

24th Nov 2025 - Remove 1 point from Brain Dump for Soltado

Video Guide

Table of Contents

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