How do you get Achilles?

Does it have to be 3/5 on all kill commendations or do you have to complete the first three so it’s at 4/5 for the armor?

Your Spartan Company needs to get all of the company kill commendations to level 3 to earn the armor. The helmet is earned through getting all company kill commendations to level 5.

The commendations all must show 4/5 to get the armor, and 5/5 has to be fully completed for helmet.