Reserve Halo 5: Guardians and receive the GameStop Pre-order Exclusive Spartan Locke armor set Helmet and Armor DLC for Multiplayer!

HUNTER-Class Armor: Sophisticated and lethal, HUNTER-class armor incorporates Watershed Division’s latest warfighting technology.

HUNTER-Class Helmet: Though still considered a prototype implementation, the HUNTER’s sensor suite enhances situational and threat awareness.

https://www.youtube.com/watch?v=29fUIsRuEZI

UPDATE: Josh Holmes, Studio Head for Halo 5: Guardians has confirmed that the Spartan Locke Armor Set is not exclusive to those who pre-order from Gamestop – it can be unlocked through normal progression.