Not sure what to make of this. It could be a simple image mix up OR they accidently revealed gun DLC possibly in the works. We know the AK-74u was featured in the single-player campaign but left out of multiplayer for some reason. One thing is for sure, the AK-74u image is the same style used in the Create-A-Class menus.
Also looks like we might be in store for some weapon double XP soon. Which is good for people that aren’t prestiging any more but would like to get attachments faster.
UPDATE: Double WEAPON XP has been activated:
SOURCE: Infinity Ward FaceBook