OPERATOR-class Mjolnir

The MJOLNIR Powered Assault Armor/Operator variant, commonly known as the Operator armor, is a MJOLNIR armor variant originally designed by Chalybs Defense Solutions, with the GEN2 version being manufactured by the Naphtali Contractor Corporation.

GEN1
There is a Mark IV variant of the armor. The Mark V variant of the armor was designed for use by Spartan operators within the ONI Beta-5 Division's Asymmetrical Action Group (AAG).

The standard version of the helmet features a B5D-O/Optics suite, which is mounted on the forehead. The UA/HUL variant replaces the standard optics suite with an up-armor plate featuring a Hardened Uplink Module on the left side. Another variant, which is issued to unit commanders, features Command Network Module-Improved on the right side.

The Operator systems's shoulder pauldrons are simply armored bands mounted on the user's base shoulder guards, with two string-like attachments descending from the bottom. There is a geometrical pattern emblazoned on the plate as well.

GEN2
The reactor of the GEN2 version of the OPERATOR armor is a low-set reactor pack. The helmet has a PV-20, which is a set of dual-locked rebreathers generally worn by pilots. The visor has an open visor view-plate for increased range of spectrum. The chest has external harness bracers. Twin-release cables on the chest route energy expenditure to reserve systems.

GEN1 development history
While the non-Spartan members of the Asymmetrical Action Group wear their own standard-issue armor, the Beta-5 Division contracted Chalybs Defense Solutions to develop a MJOLNIR variant designed to improve the performance of the AAG's Spartan personnel. The armor, which was jointly developed at the Beta-5 Division Ordnance Testing Facility and tested at Chalybs Testing Preserve, can provide the wearer with detailed, on-the-fly intelligence through secure transmissions that can bypass most Covenant security networks.

GEN2 development history
Sometime after the Fall of Reach, the Operator armor was taken over by the Naphtali Contractor Corporation, after the abandonment of all CDS facilities on Meridian, and was tested extensively with live fire exercises in the NCC's abandoned shipyards on the outskirts of Abilene. Unlike its predecessor, it optimizes a Spartan for the operation and control of vehicles.

Helmet
Developed exclusively for the ONI's Beta-5 Asymmetrical Action Group. Base Price: 7,000 cR, Sergeant UA/HUL Price: 2,500 cR, Sergeant CNM Price: 1,000 cR, Sergeant
 * Description: The B5D Facility has been the site of many unique development programs
 * Description: Up-armored varient with hardened uplink module for MILINT acquisition.
 * Description: Command network module; standard issue to UNSC Special Forces unit commanders.

Shoulders
Price: 28,000 cR, Commander
 * Description: Developed for the Beta-5 Asymmetrical Action Group at ONI's Ordnance Testing Facility.

Halo 4
Unlock: Available at Spartan Rank OP-4 Available skins: SRFC (Surface)
 * Description: Tested in the NCC's adandoned shipyards on the outskirts of Abilene.
 * The SRFC skin is obtainable at Spartan Rank OP-9

Halo 5: Guardians
Unlock: Rare REQ card
 * Helmet description: OPERATOR visor plates include hyperspectral optical sensors, though the sensor fusion software that would tie that information into VISR has yet to be finalized.
 * Armor description: OPERATOR armor has proven itself an adaptable combat ensemble in Spartan service, utilized by both pilots and force reconnaissance operatives.

Trivia

 * The helmet looks very similar to an updated concept of the MJOLNIR armor drawn by Eddie Smith which is featured in The Art of Halo.
 * Although the Operator armor is used solely by the Asymmetrical Action Group, Emile-A239 wore an Operator shoulder piece on his left shoulder.

List of appearances

 * Halo: Reach
 * Halo 4
 * Halo: Initiation
 * Halo: Escalation
 * Halo: Fleet Battles
 * Halo 5: Guardians
 * Halo Online