SOLDIER-class Mjolnir

SOLDIER-class Mjolnir is a variant of the MJOLNIR Powered Assault Armor (GEN2) that was developed by the Materials Group.

Specifications
The helmet is comprised of components similar to those used by Marines, and the helmet has a "Team endurance catalyst" intel suite. In addition, the Soldier helmet is also noted for its low power consumption and is one of the most comfortable MJOLNIR helmets to wear due to the excessive attention paid to ergonomics in its design.

The legs have a shield emitter junction, heavy plated boots, and fixed soft cases. The armor has a variable case structure, which extends combat as operators will have more equipment, ammo, and materials. All these cases have minimal disruption on most Spartan-IV. The armor also has both fixed and modular composite layers, and additional magnetic hard points.

Development history
Having entered service by January 2553, the Soldier-class variant was manufactured by the Materials Group and tested at the Damascus Testing Facility on Chi Ceti IV. Soldier-class armor functions in a support capacity on the battlefield as operators equipped with this armor can carry substantially more equipment than Spartans wearing other armor types, while retaining their field mobility and dexterity.

Because of its adaptability, design features of the Soldier system have been integrated to some newer models of ODST armor.

Usage
The Soldier variant maintains the second-highest adoption rate on the.

Halo 3 MCC
In the Halo: The Master Chief Collection version of Halo 3, the Soldier variant was added as part of Season 5 content. With the updated Halo 3 armor customization options, the players can now fit their Spartan with Soldier helmet, chest, shoulders, forearms and legs. The description of the armor pieces are the same for every set.
 * Unlock: Unknown
 * Description: Anvil Station testing has proven this is one of the Mjolnir platform's most versatile variants.

Halo 4
Available skins: Zenith (ZNTH) Default unlock: Achieve Spartan Rank 15. Zenith unlock: Complete the Spartan Spree - Master commendation.
 * Description: Rigorously tested at Damascus Testing Facility on the rocky world of Chi Ceti IV.

MCC descriptions

 * Helmet description: Rigorously tested on the rocky world of Chi Ceti IV.
 * Shoulder description: Modular left/right spaulder from Soldier-class armor.
 * Chest description: Optimized for medium-range tactical engagements.

Halo 5: Guardians
Available skins: Dogface, Leatherneck, and Rebel Default unlock: Common REQ card Leatherneck unlock: Common REQ card Rebel unlock: Uncommon REQ card Dogface unlock: Rare REQ card
 * Helmet description: Low power consumption, comfort, and obsessive attention paid in ergonomics distinguish the SOLDIER helmet design from other Mjolnir patterns.
 * Body description: The SOLDIER armor system has proven so adaptable that design features have been integrated into the latest ODST combat ensembles.

In Halo 5: Guardians due to the "Body" having a predefined customisation this armor set permanently has the following parts from Halo 4:
 * Body: Soldier
 * Shoulders: Soldier
 * Forearms: Unknown
 * Legs: Unknown

Trivia

 * The Soldier's chest piece resembles the Tactical LRP chest piece from Halo: Reach.
 * The term "leatherneck" is military slang referring to a US Marine, as is "Devil Dog", from which "Dogface" comes from.
 * The Soldier body armor was shared with the Scanner armor in Halo 5: Guardians.

List of appearances

 * Halo 3
 * Halo 4
 * Spartan Ops
 * Infinity Briefing Packet
 * Halo: Initiation
 * Halo: Escalation
 * Halo 5: Guardians
 * Halo Mythos
 * Halo: Official Spartan Field Manual