Spartan HelmetMKV HelmetLow poly game ready spartan MKV helmetThe MJOLNIR Powered Assault Armor/Mark V was the second major version of the MJOLNIR Powered Assault Armor series. The initial version of the Mark V powered exoskeleton, designated as Mark V [B],[1] was issued to the SPARTAN-IIs and several SPARTAN-III commandos on November 24, 2551,[2] while the second version of the armor was unveiled for Operation: RED FLAG on August 29, 2552.[3][4][Note 1] The Mark V armor was in service until October 2552, when it was replaced by the MJOLNIR Mark VI.[5] It could still be requisitioned by SPARTAN-IV personnel as late as October 2558, albeit upgraded to function with the MJOLNIR [GEN2] suite.