Suggest me a coop game like COD World at War

Need to scratch the same itch with my friends, in oder of priority:

1. Available on pc and has full coop campaign.
2. Military shooter that has cod like difficulty.
3. Decent graphics. Not a hard requirement but this is one of the reason that WAW isn't working for us. It's showing it's age.
4. Old guns.

Bonus points if the game environments are destructable.

Please no zombie game like L4D2 etc. Soldier on soldier combat is our jam.

Only if battlefield 1 had coop that'd been perfect.

Thanks!