Bf1 Unobtainable Weapons

This is a real shot in the dark here but I don’t have anything else I can do. I am trying to complete the list of weapons in bf1 but I obviously cannot because some weapons are still unobtainable. I don’t expect anyone to still care, but it would mean the world to me if some method became available to unlock these forgotten weapons which for me include the coup coup and the bfv preorder weapons.