SCOUT-class Mjolnir
From Halopedia, the Halo wiki
File:Modhelm.jpg
The helmet on the far right is, as of yet, an unknown armor permutation.
This unknown armor set is a type of United Nations Space Command body armor.
It will be an armor permutation in Halo 3 multiplayer. Bungie has confirmed all of the armor permutations have no effect on gameplay.
