I finished solo legendary campaign and have yet to see the armour unlock.
Also I noticed, I finish all the spartan ops chapters on legendary and last week’s legendary related challenge and this weeks on gargarin will not unlock. I’ve beaten them solo and co-op, so I’m not quite sure what’s up.
It’s only minor and not affecting me enjoying the game, but I would like to receive the armour and hopefully avoid similar problems in the future.