With the introduction of the Mileage Code Decoder, this item has been removed from the game, only the system remains.
Code Box can be obtained randomly during gameplay. Unlike Pandora's Box, it gives special weapons and maybe permanent that some of them are only available in this box but Code Box can only be decoded by using Decoder, a cash point item that can be bought from Shop or obtainable from specific events ongoing. After decoding a Code Box, the player may get the permanent weapons or models from the Code Box though the chances are very small and less likely to be rare weapons. Loots other than permanent cash weapons are point weapons, periodic cash weapons, Duration Extender, medic kit and sprays.