Borderlands 3: How to Unlock Fourth Weapon Slot

In Borderlands 3 there are numerous weapon slots to unlock throughout the course of the game.  Unlocking all four slots allows you to carry and switch between different types of weapons more quickly instead of having to head into the character menu and switch them out.

Unlock the fourth weapon slot after Beneath the Meridian

To unlock the fourth weapon slot in Borderlands 3 you will need to progress through the story.  Once you’ve completed Beneath the Meridian you’ll have the fourth weapon slot.  You should complete this around level 20.  Completing this much of the game will take some time, but there are numerous things you can do to level up quickly like tackling side missions, killing all enemies in the open world, and doing main story missions.

You can constantly track your progress via the level bar at the bottom of the screen.  It will always show you how far you have to go to the next level and when you have skill points available to use.  Once you’ve got the fourth weapon slot unlocked, you will be able to carry four different types of weapons in each slot.

Once you’ve got all four weapon slots unlocked you can carry a nice variety of different weapons that will work in multiple situations.  You can switch through them on the fly by pressing the Y Button (Xbox) or Triangle Button (PlayStation).