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Borderlands 4 Build

Alt Fuego Rafa

End Game

Leveling

Rafa

Peacebreaker Cannons

By Nepta

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

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:

Guardian Angel with 3 Amp Parts.
Watts 4 Dinner with 2 Amp Parts and 1 Recharge Delay Part.

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:

Triple Bypass because Now With Caffeine, try to get Amp on it

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)