A lot of people are wondering how they can get more weapon slots in Borderlands 2. The truth is, you don’t need to do anything special. All you need to do is reach level 50 and then head to the character select screen and select the “Add New Character” option. Once you’ve created your new character, you’ll need to head to the “Gear” tab and select the “Weapons & Gunning” sub-tab.
Here, you’ll see a list of available weapons and gun accessories. Simply select the weapon or accessory that you want to add a second slot to and then click on the “Add Second Weapon Slot” button. You’ll then be prompted to choose which weapon or accessory you want to replace the first slot with. You can also upgrade existing weapon slots by paying money or using salvage materials that you’ve collected in game.