https://www.polygon.com/2018/3/26/17161254/far-cry-5-loot-boxes-microtransactions-dlc

Far Cry 5 doesn’t succumb to the loot box trend of the past couple years, but the game does include microtransactions in the campaign. It’s unlikely that you’ll care, however.

You buy guns, attachments, vehicles and other items from in-game shops sprinkled around the map, and Far Cry 5 gives you the price for each item in both in-game dollars and silver bars. Silver bars can be purchased with real-world money, but you’ll also find a decent amount in the game without paying anything. The in-game dollars are plentiful, and you have plenty of options if you want to earn more. The hunting system of previous Far Cry entries has been simplified so that animal skins can be sold for in-game cash, for example.