Halo reach armor and waypoint

As you all know, a while back the waypoint app on the dash was altered/updated. My question is how do I unlock the last of my cqb helmet attachments? I have a 49 milestone and have the required achievements,( campaign heroic ODST, gods must be strong, and campaign complete legendary h3)

How do I unlock my helmets?

I don’t get it, y waypoint posters no help me!?