Im a real kind of gun player. Now It bugged me that in this game I can carry a lot of stuff, but not so much ammo. Well, not anymore. This mod allows you to carry up to 999 bullets for each type of gun. Note that this mod does not change the ammount of ammo you can find or buy. 

Installation: Extract the content to "C:\Users\<username>\Documents\DyingLight\Out".
 
The file "inventory_gen.src" should be in this path: "C:\Users\<username>\Documents\DyingLight\Out\Data\Scripts\Inventory"

Uninstall: delete "inventory_gen.src".

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With patch 1.21, this mod must be enabled with Dying Light Manager - http://www.nexusmods.com/dyinglight/mods/18/?