I just copy/pasted this from another thread I posted in, it gets the point across lol.
Once you hit level 50 and unlock a Specialization, you only need to progress ten more levels to "complete" that Specialization.
Example. Hit 50, choose Wetwork. You have 10 levels to gain with unique unlocks at each level. The first 9 grant you different permutations including armor, weapon skins, emblems, visors, and eventually, at the 10th level, a unique game changing perk.
So by the end of it all, you'll be SR 60. So on and so forth for each respective specialization.
http://halo.wikia.com/wiki/Specializations --- zxXStunnaXxz - Yondaime H4X Teen Gohan was the best by far... Then came Saiyaman. Oh Akira Toriyama... WHY?!
By using the search bar to find the billion other topics about this.
Oh get out. Seriously, people like you are so annoying.
From: GGearX | #002
SR 50 or immediately unlocked with LE copy.
Don't even thank him, he gave you wrong information. --- I do not aim with my hand, I aim with my eye. I do not shoot with my hand, I shoot with my mind. I do not kill with my gun, I kill with my heart.