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One Pump Chump
Updated: Sep 05, 2023
Borderlands 3

Borderlands 3
One Pump Chump

I swear, that has never happened before.
  • Content
    Base Game
  • Weapon Type
  • Rarity
  • Manufacturer
  • Elements

One Pump Chump
All Details

God Roll
One Pump Chump (Shotgun-BL3)
Copy One Pump Chump Code

One Pump Chump - About

The Legendary Shotgun One Pump Chump is manufactured by Jakobs and comes from the Borderlands 3 Base Game.

One Pump Chump - unique Ability

One-shot reload Shotgun

Shoots 1 Shotgun Slug that has a 50% chance to not consume ammo.

Ricochet Effect
Critical hits ricochet 1 bullet at the nearest enemy.

One Pump Chump - Variants

  • Elements
  • Listed Projectiles
  • Shot Cost
  • Splash Radius
  • Weapon Parts
    fixed parts
  • Anointment
  • Splash Anoints

One Pump Chump - Shotgun Parts

Weapons usually get one part per group, but sometimes multiple or none. Numbers in the top-right  indicate the range of parts a group can have.
Parts usually have equal drop chances, or it's indicated nearby.


  • Trigger_1+10% Reload Speed
  • Trigger_2+10% Damage
  • Trigger_3+10% Crit Damage


  • Bolt_1+10% Reload Speed
  • Bolt_2+10% Damage
  • Bolt_3+7.5% Accuracy
  • Bolt_4+10% Crit Damage
  • Bolt_5+35% Projectiles
    +15% Accuracy Bloom
    -10% Accuracy
    -5% Damage


  • Stock_1-30% Sway
    +5% Reload Speed
    +7.5% Accuracy
  • Stock_2-30% Horizontal Recoil
    -25% Vertical Recoil
    +10% Accuracy
  • Stock_3-30% Horizontal Recoil
    -15% Vertical Recoil
    +10% Reload Speed

One Pump Chump - Changelog

Hotfix 03.12.2020:

  • +20% Weapon Damage

One Pump Chump
How to Farm

One Pump Chump
Assigned Loot Pool

One Pump Chump
Dedicated Drop

Dedicated Drop

Dedicated Drop

Dedicated Drops are weapons that only drop from its dedicated sources.
Unlike World Drops who can drop almost everywhere at a small chance.

One Pump Chump
Drop Rates

  • One Punch
The number next to the Source notes Loot Luck.

Loot Luck Formula


P = Dedicated Loot Pool Chance
L = Loot Luck

One Pump Chump
Grinder Recipe

This recipe requires 1+ DLC-Legendary!
ShotgunShotgunAny Legendary WeaponplusAny Legendary WeaponShotgunplusAny Legendary WeaponAny Uncommon WeaponequalsShotgunShotgunEpic or Legendary PistolEpic or Legendary Shotgun
The Grinder⚙️ recipe for the displayed chances.
Consoles may have a better recipe that's the best on PC.

One Pump Chump
Dedicated Sources

One Punch

One Punch

Lectra City
Named Enemy