codes for the raider 2 helmet and what is the dlc1

Games Other Halo
#1

Tryin to unlock raider 2 helmet in waypoint won 1000 match making games but dont know what to do from there

#2

Please tell me that you have halowaypoint installed on the Xbox 360

Also Raider codes are here
Raider DSST Code

Default Raider Code

Bonus, Orbital Swift (Yanumas Code)