I can’t seem to find any way to unlock these “new” armor permutations, if anyone can let me know how to, that would be greatly appreciated.
The new Halo 3 armour will be unlockable when Season 5 arrives. When that is, we currently do not know.
They will be unlocked when season 5 is out
Like the others have said, it will be available in season 5, which is expected to come this month