Right. Basically, 500 days vet accolade unlocks chrome on the upcoming C-Store Jupiter pack (5 Jupiter jackets)

It also unlocks Vet Jupiter Jacket.

There are a total of 6 Jupiter Jackets. 1 Vet Reward and 5 C-Store. All get optional chrome with the Vet reward. All have the option to disable the chrome and use a flat color for that part of the jacket.

Longterm, Cryptic's character artist would like to update other existing uniforms so that 500 day vets can display chrome pieces on them.