Borderlands 3: Walkthrough & Strategy Guide
One Pump Chump Legendary Shotgun - How to Get & Stats
One Pump Chump Legendary Shotgun - How to Get & Stats | Borderlands 3 - GameWith

Borderlands 3 | BL3
One Pump Chump Legendary Shotgun - How to Get & Stats

Last Updated:
Hot Topic
Learn How to Beat Wotan The Invincible Raid Boss!

Read this Borderlands 3 guide to learn more about how to get the Legendary / Unique One Pump Chump Shotgun! Learn more about how to spawn the legendary item, how to farm it, and more!!!

Table of Contents

Find More About Legendary Weapons Here

One Pump Chump - Legendary / Unique Weapon Stats & Traits

One Pump Chump
- I swear, that has never happened before.
- +1425% Weapon Damage
- +24% Reload Speed
- 3.5x Weapon Zoom
- 50% chance not to consume ammo when fired.

*Shown stats are excerpted from the variation confirmed in-game!!!

Legendary Scoped Single-Shot Weapon

Scoped Single-Shot Weapon

The One Pump Chump is a powerful early-game Jakobs weapon that you can use to deal with strong enemies. It always comes with 3.5x weapon scope and will always have a magazine size of one.

Has a Chance To Not Consume Ammo

The One Pump Chump has a chance to not consume ammo when shot. This means that you will be able to fire more than a single shot before needing to reload!

Deals Incredibly High Damage

Deals Incredibly High Damage

What makes the One Pump Chump so powerful is that it has at least a 1000% increase to its damage. This will allow you to one-shot most enemies in the game, or deal substantial damage against bosses!

How to Get One Pump Chump

How to Get One Pump Chump Farming Method

1Travel to the Promethea Planet
2Head to the New-U Station in Lectra City
3Go to the subway via the entrance near the New-U Station
4There will be a narrow corridor on the left of the first area with enemies
5Solve the puzzle to open the door where the One Punch Psycho spawns
6Defeat One Punch Psycho
7If the enemy does not drop the weapon, reload the game and repeat steps 1~6

2. Head to the New-U Station In Lectra City

New-U Station Location

New-U Station Location

The image above shows the location of the New-U Station near the city subway area. Use this map as a reference to find out the exact location of the One Pump Chump.

5. Solving the Puzzle

Solving the Puzzle

Below are the steps you need to do in order to spawn the One Punch Psycho.

Solving the Puzzle Walkthrough Chart

1Use the leftmost button next to the padlock
Step 1
2Turn the valve on the right side
Step 2
3Pull the lever next to the valve
Step 3
4Pull the switch on the box to the left side
Step 4

6. Defeating Unique Psycho One Punch

Stay Away From Melee Distance

Stay Away From Melee Distance

Keep a safe distance when engaging the One Punch Psycho. This enemy has the ability to kill you with one punch. Use high DPS weapons that can shoot from range, and aim for the head to constantly stagger the psycho!

One Pump Chump Drop Not Guaranteed

The One Pump Chump Shotgun is not a guaranteed drop from the One Punch with drop rate waning around 10%, If the enemy does not drop the weapon, quit the game and return to main menu to repeat the steps until the enemy drops the weapon!

Easter Egg Reference & Spoof

One Punch Is a Reference To One Punch Man

Drops from the One Punch Psycho

One Punch is a reference to the Japanese superhero comic series "One Punch Man". The two share the same ability of being able to defeat anyone with a single punch! Don't get too close to him as he deals incredibly high damage!

Borderlands 3 - Related Articles

Playable Character

All Character Tree - Build & Overview

Weapon & Item Database

Story Walkthrough

Useful Information

© 2019 Gearbox. Published and distributed by 2K.
Trademarks are the property of their respective owners. Its licensors have not otherwise endorsed and are not responsible for the operation of or content on this site.
Borderlands 3 - Official Page

Have some feedback? Click here

Your feedbacks will be checked by our staffs and will be attended to accordingly. Please be advised that we may not reply to every individual feedbacks.

Reader Comments
Max. 300 Characters

By clicking Submit you are agreeing to the Terms of Use.
*Offensive, insulting or inappropriate use of forum may lead to ban/restriction.
To avoid griefing, you will not be able to post or report for the first %d hours upon visiting this forum for the first time.

Kimmelovski 6

The puzzle is just the lever twice and the wheel once to the right, and done. But the damage is not nearly as high as in the vids on youtube.

Anonymous 5

The puzzle if done respectfully from left to right, there are 5 switches, do the 5th switch (Lever) twice then the 4th (Valve) once. 5-5-4. It should do the trick.

Anonymous 4

Dropped on third encounter. Had to do the puzzle sequence twice somehow.

Anonymous 3

For some reason, the damage modifier doesbt apply when i use the one pump chump... i feel like it's over rated tbh...

hi 2

for the puzzle what worked for me was hit the left ****on 3 times, valve, then lever

GameWith Announcements
Article Menu
Latest News
Mission Walkthroughs
DLC Mission Walkthrough
Character List
Game Database
Play Tips
Useful Information
Maps & Locations