MJOLNIR Powered Assault Armor/Black
From Halopedia, the Halo wiki
MJOLNIR: Black is a "skunkworks" prototype of the MJOLNIR Powered Assault Armor, likely part of MJOLNIR's Advanced Hardware Program. It was designed by a top-secret parallel development lab in Songnam, Korea. Spartan Black Team was equipped with MJOLNIR: Black from at least the summer of 2552 until their deaths in July 2557.
MJOLNIR: Black is superficially identical to the Mark VI variant. However, it features several unique internal design elements. The heads-up display has a field of view of nearly five kilometers, allowing extreme-range reconnaissance. Black Team's armor (the only known examples of the model) was colored black rather than the standard olive green, increasing the user's ability to hide in shadows. One arm hosts a device nicknamed the "Interrogator", featuring a built-in microphone, processor, and speaker for translation of Covenant languages to English and from English to Covenant speech. The armor is capable of carrying a smart AI. Black is the third known Mjolnir variant to feature recharging energy shielding as standard, following the Mark V[B] and Mark V armors.
Being a prototype, Mjolnir: Black features some flaws. It has trouble displaying exact altitude, making three-dimensional tracking difficult. The biofoam injectors are known to mistakenly set broken bones incorrectly.
Mjolnir: Black's faceplate is said to be reflective gray in "Blunt Instruments", but in Halo: Blood Line is shown as gold, even during a flashback to the events of the short story. The faceplate is also shown as gold in Halo: Escalation.
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