bungie owns me a recon helmet
You can find all the information about Reach armour in this pinned topic:
https://www.halowaypoint.com/en-us/forums/cdecc00475c645b9a4d0a156fb542d59/topics/how-to-get-the-halo-waypoint-armors-for-halo-reach/814418ad-e302-4619-b604-d52ec9d7a69b/posts