Mandalorian armor is (as far as i know) not in-game for players. The skin is in the game (Boba Fett and a trainer in Tyrena). There is a way that you can make a certain set of armor, Composite, to look like the Mandolorian. The skins do not affect any of the stats or anything. And all the packs do is carry additional items and look cool. The packs are: travel packs, bounty hunter packs, military packs, and one more but i forget.