Haven' unlocked much yet but got a +20% handling for the bow and a +20% damage mod. Very Rare apparently. Otherwise I only got +6% fire og freeze mods I think.
I upgraded my bow with 2 mods and the outfit with one.
I found only one positive thing about Indefinite Warfare, the graphics. Looked great but that was it. I borrowed it from a mate and I uninstalled it after an hour. Too many routs/camping spots, too few guns and the usual shit with hit detection.
I believe the franchise will stop in 2-3 years max.