Preorder Halo Reach and receive GameStop exclusive in-game UA Multi-Threat Mjolnir Mark V(B) Armor. While Mark V MJOLNIR armor is designed to operate in a wide variety of combat situations, the UA/Multi-Threat configuration provides Spartans with the most impact across all combat scenarios. The chestpiece's lightweight design allows for maximum freedom of movement while standard MJOLNIR defense systems provide the resilience that helped make Spartans the stuff of legend.