How Do You Get the 3rd and 4th Weapon Slots?

In Borderlands 3, there are a total of four weapon slots. However, the third and fourth weapon slots are not unlocked by default.

Instead, they must be unlocked by completing two specific challenges.

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The first challenge is to reach level 2 with any character. Once this has been done, the third weapon slot will be unlocked.

The second challenge is to reach level 5 with any character. Once this has been done, the fourth weapon slot will be unlocked.

These challenges can be completed at any time and in any order. However, they must be completed with different characters in order to unlock both weapon slots.

So how do you get the third and fourth weapon slots? By reaching level 2 and level 5 with any character respectively. These challenges can be completed at any time and in any order, but must be done with different characters in order to unlock both weapon slots.