How do I get 3rd and 4th weapon slot for co-op player?

borderlands 3 4th weapon slot   Dan borderlands 3 4th weapon slot

After that you fight Mad Mel Just turn in that mission by following the checkpoints into New Haven and you have your 4th weapon slot

Completing the Story Mission: Bright Lights: Flying City grants you the 4th weapon slot #1 IvanLeTerrible  weapon with an anointment (so you should be able to reroll with Borderlands 3

dipo 4d slot Once you've completed Beneath the Meridian you'll have the fourth weapon slot You should complete this around level 20  Basically, players will need to complete all of the main missions on the planet Promethea and the fourth slot will unlock automatically Without