The AUG A3 is found in both the SAS and USMC campaign missions in Call of Duty: Modern Warfare: Mobilized. It is equipped with a Red Dot Sight, which is a little misaligned. It has a moderate rate of fire (fast when compared to other weapons), a standard magazine size, good optics, quick reload, and is fairly accurate.
The AUG A3 returns completely redesigned, sporting a tan finish and a different scope. It is statistically the same as it was inModern Warfare: Mobilized, but now has recoil. In the campaign, it is only used by friendly forces, and is available to the player in several missions. The scope has a new, more accurate reticle. It also has a new reload animation.