Master chief amrour didn't unlocked! :( helpo

I didn’t get master chief armor online? I just completed solo campaign on legendary. Do I need to do something after that to unlock cheif armor? can someone help me please thank you.

> I didn’t get master chief armor online? I just completed solo campaign on legendary. Do I need to do something after that to unlock cheif armor? can someone help me please thank you.

I read that you need to get the Bromageddon achievment.

Are you taking the piss? I just solo’ed and I don’t want to do it again. Please can someone help ;(