I have been playing Halo 5 Guardians since release date and still havnt received the Teishin Raikou armour set. My friends are all telling me they have it. Yes I have played multi-player as well as campaign.
Same here 
Check your back messages on live. I didn’t see mine until I was on the xbox app
I still have not got mine yet. It took them quite awhile to give me my pre-order bouns too.
should have received it as a message from xbl
On my head hehe
join too my spartan company i accept the spartan fun.
Edit- signed out then in problem solved
Wth. Checked my messages redeemed code it said success but still no req pak to open
I still haven’t received mine either and I bought and have been playing the game since day 1.
Check your notifications on the XBOX, just below messages, or is it messages?
either one
Edit: Lol I don’t know about any fo you guys but I got my Teishin two days ago, hopefully you did as well.