I don't actually think the Far Cry 5 co-op mode can be considered co-op, if me and my friend want to play the game together one of us will have to play through the entire game twice to unlock anything apart from character upgrades.
We didn't notice until 4 hours in that I hadn't unlocked a single weapon in the shop whilst he had unlocked several.
This is absolutely unacceptable in a CO-OP mode in 2018.
This on top of the many many bugs and glitches that keep happening in our playthrough.