I’v recently unlocked the Achievement “Legend” from Beating all four Halo games in the Master chief collection on Legendary.
But i haven’t unlocked the Helioskrill armor in Halo 5 yet… is there a wait time or something before i get it or is it a bugg?
if there is any 343i emplyees that could help me resolve this problem. you can even see that i got all missions completed on legendary single player or co-op on my Halo waypoint profile.
I heard it was enabled to be gotten in a pack so maybe you cant get it that way anymore
Maybe idk, it would be really -Yoink- though, but i guess i can see that being the reality lol. thx for taking your time 
You can still get it from MCC, like it should’ve always been.
Try loading a custom game on MCC first, before going to Halo 5.
Once you get it, it’ll be in the first slot in your Armor and Helmet. (At least mine is)
Go into H5, and check under customization option. Not your req inventory. It shows up in customization, right away, but it will take weeks before it will be unlocked in your req inventory. You can equip it from customization. If it is not there, put MCC back in your xbox, and go into the menu, any option, such as emblems or something. Take MCC out of your xbox, and start h5, it should be in your customization menu.
Just unlocked Helioskrill yesterday. Did all campaigns with no skulls on (that can cause achievements to not unlock), and after i finished went straight to h5 and lo and behold in my inventory i had helioskrill.