SCOUT-class Mjolnir

The Mark VI MJOLNIR Powered Assault Armor/S variant, more commonly known as Scout Armor, is a type of United Nations Space Command body armor. It is first seen in Halo 3.

Introduction
Scout armor is a variant of the standard Mark VI MJOLNIR powered battle armor. The armor uses advanced materials to give it stealth properties. It is an armor permutation in Halo 3 multiplayer, and like all armor permutations, it has no effect on gameplay.

Development and History
The SCOUT and RECON projects were run as parallel projects intended to develop a single variant of the MJOLNIR Powered Assault Armor with stealth capabilities and no impact on endurance; however, the SCOUT variant relies heavily on advanced materials. It was tested in ONI's Ordnance Testing Facility B5D at Swanbourne, Perth, Australia.

Helmet Characteristics
It features a cap-like protrusion, along its rim and a beak-like protrusion under the chin. It is usually best to use this armor for sniping because its thin, slit-shaped visor keeps it less visible than other helmets. Its general shape, could be compared to a dirt bike helmet.

Shoulder Characteristics
The shoulders are angular and straight. Unlike other shoulder pads, the Scout shoulders are attached slightly above the elbow instead of on the shoulder. They are remarkably similar to the original Marine armor from Halo: Combat Evolved and the shoulder plates of the Brutes in Halo 2.

Chest Characteristics
Like in other MJOLNIR variants, the chest plate is simply an attachment, onto the already existing Mark VI armor. It consists of an H-shaped plate over the upper torso and a pair of articulated plates attached to its bottom. It's theorised that the H-Shaped Metal plate is merely a storage device to aid in weight distribution and allow for easier movement for missions involving Stealth and reconnaissance.

Unlock

 * Head: Accomplish the Used Car Salesman Achievement.
 * Shoulders: Accomplish the Mongoose Mowdown Achievement.
 * Body: Accomplish the Too Close to the Sun Achievement.

Trivia

 * The official Halo 3 Strategy Guide, incorrectly states that the shoulder pads are unlocked by gaining the Used Car Salesman achievement.
 * The Scout chest piece had a glitch: it would sometimes relock itself, even if the requirements for unlocking it had been achieved. Luckily, Bungie recently fixed the glitch in the first Halo 3 Auto Update (AU1).
 * The Meta from the Red vs Blue: Reconstruction, trailer wears a Scout chest plate.
 * This armor's helmet is considered a great sniper helmet because of its small non-revealing visor, which reduces sunlight reflections. Also, it is a good choice of armour if you are a good sniper. For example, using Scout and changing your colors to tan will give you the advantage of sniping on Sandtrap.
 * Some people state that they have unlocked the shoulders by acheiving We're in for some chop; however, this has been proven false.
 * Mcfarlane has produced a Spartan Solider Scout armor with different colors with interchangeable armor pieces
 * You can unlock every part of the Scout armor in campaign with the exception of the shoulder pieces.