AC4 Helmet Mounted Display

Used widely by various UNSC Special Forces groups during the Necros War Era, the AC4 Helmet Mounted Display is a supplement to most armor systems employed by the UNSC, private security firms, and various paramilitary groups. The AC4 HMD Armor Supplement was developed by Acumen Science Laboratories, and in turn distributed by Misriah Arms.

Display Features
The AC4 is able to be linked to up to 12 helmets at a time, allowing for squads to quickly identify squadmembers' statuses. The Armor Supplement can report injuries in squadmembers, showing vitals and heartbeat rates next to a programmable name for quick identification. The HMD also includes a map of the surrounding area, given that one is provided, the soldier's own vital signs and heartbeat rate, an ammunition counter, a fiber optic connection wire, and in most cases, an energy shield meter.