Borderlands has been one of the more successful first-person shooter franchises since its inception, with its installments consistently hitting the mark with fans and critics. With previous entries performing so well, Borderlands 4 may be under even more pressure to deliver high-quality gaming experiences to players, but one visionary feature from Borderlands 3 could make Gearbox Software's task a little easier. The Mailbox allowed players to send weapons to their friends in-game, helping to foster a much-welcomed sense of community, and the Borderlands franchise could take the element to the next level with a few tweaks.