I still haven’t gotten my code… Has anyone else not gotten theirs?
Just be patient! They said some may not get theirs until a little later! 
Patience… Use the force my young padawan…
But in all seriousness, just wait for the rest of the day and it should turn up
I think the key to H4 is waiting.
Please use this thread to discuss the Specializations email topic:
https://forums.halowaypoint.com/yaf_postst148869_Halo-4-Specializations-Email.aspx