This is happening to me, also. Anyone discover any magic tricks that work to get this achievement to unlock?
Edit: I believe the problem is that you need 10 kills starting from the point you download this DLC. For me, I already had 5 MTAR kills from Scavenger games before I had the CQ DLC. I had to have 15 kills with this weapon before the achievement unlocked, after checking my Battlelog.
I just kept playing Gun Master games over and over until the achievement unlocked after I knew I had enough MP5K kills. MP5K is the only weapon not usable in Gun Master.
Last edited by d00gler; 03-03-2013 at 05:54 AM.