1. place in your squad(player commander) the static gunner of automatic grenade-launcher and assistant of gunner automatic grenade-launcher( Only from faction of Pacific NATO).
2. order to assistent of gunner to throw down his backpack.
3. select gunner and press button 6 - for this unit in the menu of the special action, will not exist command "mount automatic grenade launcher".
I remind all who do not know or not remember it! In the actions menu, there should be a command for mounting static weapon.