Gun modules are containers the player can find in safe zones. Gun modules will have a letter on them corresponding to which kind of weapon they will give the player:
Additionally, with each module comes a helping of two kinds
- 1 Health is provided by a heart container
- 2 Charges are provided by a square container
If the player shoots a gun module while using the Reverse Engineering upgrade, the weapon inside will randomly shuffle to a new one.
Although normally a Gun Module can only contain new weapons, shuffling one in this way may instead yield the player's own weapon.