EOD-class Mjolnir

EOD-class Mjolnir (Explosive Ordnance Disposal), also designated as the MJOLNIR Powered Assault Armor/EOD variant, is a MJOLNIR armor variant originally designed by Materials Group, with the GEN2 version being manufactured by the Naphtali Contractor Corporation.

Specifications
The helmet was designed to channel the pressure wave of a nearby detonation around the user's head, significantly reducing the likelihood of decapitation in the event of an explosion. The MJOLNIR/EOD variant's pauldrons and chest plate were designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment and protecting Spartans during operations that involve the handling of explosive ordnance (e.g., clearing/planting land mines, demolishing enemy structures/material and, or planting/defusing bombs).

Development history
The MJOLNIR/EOD variant was originally created at the UNSC Damascus Materials Testing Facility on Chi Ceti 4. The EOD variant is speculated to have been developed in response to the death of Samuel-034 (the first Spartan killed in action) in November 2525.

Usage
EOD is fielded by Spartans deep in enemy lines, allowing them to navigate dangerous territory to disable or destroy enemy mines before the UNSC properly arrived. In the post-war era, the GEN1 EOD set, specifically the helmet, is still favored by Spartan combat divers and pioneers tasked with demolition roles.

Specifications
The helmet has a pressure-resistant hardened rebreather unit. The reactor has alternating heat-tempered balance drives. The pauldrons are flow-distributing ceramic plates. The GEN2 kit also includes anterior torque couplings.

Development history
In 2554, Abilene's Naphtali Contractor Corporation took control over the EOD armor's production, and adjusted the systems plate configuration to reduce the potential for dismemberment during explosive ordnance activity and facilitation. It was tested at the Buffalo Breaker Yards. They proposed numerous enhancements to the armor's systematic approach to the GEN2 framework.

GEN2 compatibility
In the post-war era, the GEN1 version of the EOD helmet could be requisitioned by Spartan Operations personnel for use with their GEN2 Mjolnir suits.

Helmet
Unlock: Unlock the Campaign Complete: Legendary achievement.
 * Description: The Mjolnir/EOD variant was created at UNSC facilities on Chi Ceti 4. The helmet was designed specifically to channel the pressure wave around the user's head, significantly reducing the likelihood of decapitation.

Shoulders
Unlock: Complete The Ark on Legendary difficulty.
 * Description: Developed at the UNSC Damascus Materials Testing Facility on Chi Ceti 4, the Mjolnir/EOD variant was designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment.

Chest
Unlock: Complete Tsavo Highway on Legendary difficulty.
 * Description: This variant was designed specifically to protect Spartans during operations involving the handling of explosive ordnance (e.g., cleaning/planting land mines, demolishing enemy structures/materiel).

MCC

 * Description: EOD helmets were designed to significantly reduce the likelihood of decapitation.

Halo: Reach - Mark V GEN1
Developed at the Damascus Materials Testing Facility on X Ceti 4; entered service in 2531. Base cost: 15,000 cR, Sergeant CNM cost: 5000 cR, Sergeant UA/HUL cost: 3000 cR, Sergeant
 * Description: Designed specifically to reduce likelihood of decapitation.
 * Description: Command network module; standard issue to UNSC Special Forces unit commanders.
 * Description: Up-armored variant with hardened uplink module for MILINT acquisition.

Halo 4 - GEN2
Available skins: Shadow (SHDW) Default unlock: Achieve Spartan Rank 45 Shadow unlock: Complete the Regicide Victory - Master commendation.
 * Description: Abilene's NCC took over production of this Mjolnir kit in 2554.

MCC descriptions

 * Helmet description: NCC took over production on this helmet in 2554.
 * Shoulder description: Modular left/right spaulder from EOD-class armor.
 * Chest description: Underwent field trials at the Buffalo Breaker Yards.

Halo 5: Guardians - GEN1
Unlock: Classic Helmet REQ Pack
 * Helmet description: The unique combination of safety and life support features in the EOD helmet make it an optimal choice for Spartan assault divers and pioneers who undertake demolition roles. That it also mitigates the risk for decapitation is a bonus.

Trivia

 * Bungie Armor is a slight variation of the EOD chestplate. Bungie Armor lacks the three mid-level lights and has an effect that causes flames to appear around the helmet.
 * According to a Bungie poll, EOD was the 5th most popular helmet variation in Halo: Reach.
 * The rebreathers featured on this helmet are similar to the CBRN attachements available for the Security and Gungnir helmets.
 * The Caduceus emblem that appears on the Mark V EOD helmet also appears on med packs, Army medics, and the Tactical/Trauma Kit armor permutation. This suggests that the EOD may also have an intended secondary role to provide medical assistance to wounded allies in dangerous situations. It's possible that there may be a non-MJOLNIR variant of the helmet for use by UNSC medical personnel, likely in toxic environments where the distinctive CBRN would aid in operations.

List of appearances

 * Halo 3
 * Halo: Reach
 * Halo: Fall of Reach
 * Covenant
 * Invasion
 * Halo 4
 * Infinity Briefing Packet
 * Halo 5: Guardians
 * Halo Infinite