The full extent of the VIGILANT's surveillance and stealth capabilities remain highly classified. Observers have speculated the suit includes a new reconnaissance and fire control system for directing orbital artillery strikes.
— Helmet description
Mjolnir Powered Assault Armor/Vigilant is a variant of Mjolnir Powered Assault Armor designed to resemble the Mjolnir/Scout armor used by Jun-A266 in Halo: Reach. It was first introduced in the Memories of Reach update for Halo 5: Guardians.