UA attachments

UA, short for up-armor, is a category of supplemental armor attachments and accessories compatible with the MJOLNIR Powered Assault Armor. Like some other MJOLNIR variants, many of the UA pieces are not exclusive to the MJOLNIR system, but are in use by regular UNSC Army or Marine troops as well.

Helmets
Most of the helmet variants available in Halo: Reach have an up-armored upgrade, sometimes coupled with other external helmet additions such as the UA/HUL attachment to the Mark V [B] helmet. UA helmet attachments consist of reinforced metal plates or bracers attached to the helmet's forehead to give better protection to the wearer in combat.

Trivia

 * The UA/Multi-Threat appeared in the Beta as the ASSAULT/SCOUT, this version did not include a belt. Likewise the UA/Base Security [W] appeared as the MP/BASE SECURITY which also did not include a belt. The belt-less versions remained in the files of Halo: Reach, but went unused.
 * It was not until the release of Season 1: Noble in Halo: The Master Chief Collection that the belt-less versions returned.
 * The UA/BUCKLER is named after a small hand-held shield from the middle ages of the same name.
 * The UA/CHOBHAM is named after the composite tank armor of the same name.

List of Appearances

 * Halo 3
 * Remember Reach
 * Deliver Hope
 * Halo Reach
 * Halo 5: Guardians
 * Halo Infinite