Quote:This Greatest Hits Customization REQ Pack unlocks five permanent REQs selected from visual customizations most frequently equipped by Spartans who have them – all of them Ultra Rare or better rarity, if available*. Usable in Arena, Warzone, and Warzone Firefight game modes, these visual REQs include weapon skins, armors, helmets, and even assassinations!
You mention you only got 2 visors, that may be because you have the other items in the packs already? Or you also received other cosmetic items that weren’t armour such as weapon skins, assassinations etc.
Like the pack description above mentions; you get 5 permanent unlocks per pack from a pool of items. You aren’t actually guaranteed to get armour from them.
Considering you’re a fairly lower level you probably haven’t unlocked most items which would mean the chance of getting armour would be slightly lower because there would be more skins, visors, assassinations to unlock as well as armour on top of that. Just bad luck of the draw.