Description from original post (created 2012-09-27 14:49):
"Tested in the rough and tumble streets of downtown Kirkland, Washington."
-FOTUS Chest, Helmet, And Shoulders Description.
The MJOLNIR Powered Assault Armor/FOTUS is a variant of the MJOLNIR Powered Assault Armor (GEN2) utilized by SPARTAN-IV supersoldiers. It appears to be based on Forerunner technology, with the helmet resembling the head of a Promethean Knight.
The FOTUS armor is presented as a metafictional joke. It is said to have been developed by 343 Industries tested in Kirkland, Washington, which is 343 Industries' hometown. The gauntlets are designed to defend against cougar attacks in the "Land of Kirk", while the FOTUS greaves earned high marks during coffee runs on rainy days. The prominent spike on top of the helmet is a reference to 343 Industries' running unicorn gag, which is also referenced in Halo: Combat Evolved Anniversary. While the FOTUS armor is presumably canon, the Armory's descriptions of the suit's components are very tongue-in-cheek and obviously not meant to be taken seriously.