From Halopedia, the Halo wiki
The helmet has spatial recognition functionality. The suit has full-mobility, overlocking movement packages. The pauldrons are embedded, minimal silhouette pauldrons for improved close-quarters combat.
The lessons learned from Concord and advancements made with the project during the waning years of the Covenant War were only fully realized by the VENATOR model built upon the new GEN2 Mjolnir platform. Engineered for a variety of uses in the field, Lethbridge Industrial’s philosophical approach on improving user opportunity during hand-to-hand or single-enemy combat helped define the benefits that make VENATOR-class armor so effective.
After the Requiem Campaign, Lethbridge Industrial improved the Venator's power management subsystem and reduced its maintenance requirements. By October 2558, the armor's firmware had incorporated a generalization of predictive targeting algorithms originally created to assist new Spartans in close-quarters combat.
Available skins: Raptor (RPTR), Bayonet (BYNT), and Refractive (RFCT)
Halo 5: Guardians
Available skins: Cestus, Retiarus, and Thraex
In Halo 5: Guardians due to the "Body" having a predefined customisation this armor set permanently has the following parts from Halo 4:
Halo 4 skins
Halo 5: Guardians skins
List of appearances