The Grinder in Borderlands: The Presequel (BL:TPS). Insert three items if you want to grind at this machine!

Before loading items in the Grinder

After adding 3 weapons to the Grinder

The Grinder produced a legendary pistol

These are all the Grinder Recipes in Borderlands: The Pre-Sequel

You can find the Grinder in Janey Springs' workshop in Concordia. You can use it after you complete the side-quest Grinders

Credit: Got lots of the info below from BTHRZeroX's post on reddit

Basic Weapons [ edit ]

Note: If you don't moonstone grind, you have a chance of getting a weapon of rarity one level below the one you wanted (for example purple instead of orange, blue instead of purple, etc)

Green Weapon - 2 White weapons of desired type + 1 additional White random weapon

Blue Weapon - 2 Green weapons of desired type + 1 additional Green random weapon

Purple Weapon - 2 Blue weapons of desired type + 1 additional Blue random weapon

Legendary Weapon - Has to be 3 legendary weapons

Random Weapons [ edit ]

Green Weapon - 3 White weapons of different types

Blue Weapon - 3 Green weapons of different types

Purple Weapon - 3 Blue weapons of different types

Legendary Weapon - 3 Legendarys, 2 Legendarys and a Purple of the same type as your desired legendary (ie Pistol, Shotgun ect), or 3 purples of different types

Assault Rifle [ edit ]

1 SMG + 1 Sniper Rifle + 1 Shield, All White

1 SMG + 1 Sniper Rifle + 1 Shield, All Green

1 SMG + 1 Sniper Rifle + 1 Shield, All Blue

Rocket Launcher [ edit ]

2 weapons + 1 Grenade Mod, All White

2 weapons + 1 Grenade Mod, All Green

2 weapons + 1 Grenade Mod, All Blue

Shotgun [ edit ]

1 Pistol + 1 SMG + 1 Shield, All White

1 Pistol + 1 SMG + 1 Shield, All Green

1 Pistol + 1 SMG + 1 Shield, All Blue

SMG [ edit ]

1 Assault Rifle + 1 Pistol+ 1 Shield, All White

1 Assault Rifle + 1 Pistol+ 1 Shield, All Green

1 Assault Rifle + 1 Pistol+ 1 Shield, All Blue

Sniper Rifle [ edit ]

1 Assault Rifle + 1 Shotgun + 1 Shield, All White

1 Assault Rifle + 1 Shotgun + 1 Shield, All Green

1 Assault Rifle + 1 Shotgun + 1 Shield, All Blue

Oz Kits [ edit ]

Note: Unless moonstone is added, you risk getting an item of same rarity

Any 3 Oz Kits, All White

Any 3 Oz Kits, All Green

Any 3 Oz Kits, All Blue

Shield [ edit ]

Note: Unless moonstone is added, you risk getting an item of lower rarity

Any 3 Shields, All White

Any 3 Shields, All Green

Any 3 Shields, All Blue

Grenade Mods [ edit ]

Note: Unless moonstone is added, you risk getting an item of lower rarity

Any 3 Grenade Mods, All White

Any 3 Grenade Mods, All Green

Any 3 Grenade Mods, All Blue

Moonstone Bonuses [ edit ]

Use Moonstones in the Grinder to get bonuses for your items: