MJOLNIR HD Powered Assault Armor

The MJOLNIR HD Powered Assault Armor is similar to the Regular MJOLNIR Powered Assault Armor System. Its main difference is the noticeable size and bulk of the system. Its was designed by the Materials group in 2522 and was deployed in 2525 when the SPARTAN-IIs received their first set of Mjolnir. Part of its design is the attachment points for heavy weaponry on the Forearms and Shoulders. In 2551 it was upgraded to the Mark V platform, giving it shields and the ability to carry a shipboard AI. In 2552 it was retired when the Mark VI was introduced due to budget cuts to design its upgraded hardware.
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=== MJOLNIR HD Powered Assault Armor/O Variant ===
The only variant of the MJOLNIR HD PAA System is the Ordinance Variant. The main visual difference is the heavy weapons used. It utilizes the AIE-486H Machine Gun, LAU-434/A, and the M512 Smooth-bore high-velocity cannon.