I have ps3 so didn't get to try it out yet ,but from what i heard /saw i would say try to maximize the advantage of it having a great range with low recoil, so optics + fast mag and stay medium range with it.If you try CQC most likely you will get dominated.
(again just from the gameplay /commentary/ reviews of people i saw)
People have been telling me.. literally anything with a holographic sight or target finder is good. However I haven't been able to use the gun since I don't own Bo2 on 360. But I've seen people and heard people using those to optics. Other attachments... haven't heard much besides extended mag to be honest.