If you're just looking to shoot up the town without any restraint whatsoever, this is what you need. This mod is a little code change that will allow for unlimited ammo for any weapon in your arsenal. Reload and you've got more ammo. Keep reloading and your mountain of bullets will be more than a match for anything this city throws at you.
Credits: Masskiller1523
https://mafiamods.com/uploader/masskiller1523/