How to get the yellow visor in Halo 4

just wondering, how do you get the yellow visor in Halo 4? Not the golden Legendary visor just straight yellow. Please let me know.

The yellow visor is unlocked by reaching lvl 6 when ranking up the Stalker specialisation.

Thanks for the help!

Hmm… i still like red or black

Honestly, I prefer the legendary visor.