UNLOCKing The SPECIALizations HELP ME!!!

So I’ve completed 2 specializations after reaching the level of 50 and I’m unable to access any others. I’ve completed WETWORK and OPERATOR. I did’t play halo till NOV 30, so i didn’t get the early access codes. Is there anyway to unlock the other specializations? If so, How??

Well, specialization codes were emailed to those who played before November 20th, so I’m sorry to say that you’re outta luck! 343i is currently aiming to unlock all specializations for everyone in early 2013.