How Exactly do u get Master Chiefs Armor?

I recently beat Halo 4 on Legendary solo but only half of the missions were connected to Live. Can i redo the remaining missions with a friend to unlock Chiefs Armor or do i have to redo them solo?

I would suggest redoing them solo, just in case. Also, make sure you’re checking your connection every now and then if the game has already dropped you once.

I think completing them co-op is fine.

If the Mk VI is unlocked by Legendary Solo, then you need to do the missing missions solo again.

Bad luck.