From Halopedia, the Halo wiki
The helmet uses a Prototype VISR 5.0 monocular plating. The chest has a duress-limiting collar base for strain testing, a component shelf for ad hoc modularity. The reactor pack has dynamic reactor vents to prevent internal expenditure.
The Vanguard variant was manufactured by Hannibal Weapon Systems on New Carthage in the industrial township of Kotka. Vanguard-class armor was a state-of-the-art front-line tech used primarily by SPARTAN-IV personnel in direct enemy engagement. Unlike other armor systems that facilitate secondary and tertiary needs, it focuses solely on face-to-face combat with enemy units.
Available skins: Converge (CNVG)
Halo 4 skins
List of appearances