Players have pointed out a hidden RPG that is in one of Advanced Warfare’s Campaign mission. The weapon, which can only be found by going way off path into a certain building on the mission “Throttle,” can actually be used in the level. The weapon is one of the only weapons in-game that is actually modern-based weapon.
The weapon is called “Weapon-RPG.” It’s probably not supposed to be there and if you do use it, it makes no sound when you fire.
Checkout the video here on where to find it, if you’re interested: