Special weapon skins are also available through expansion seasons or the Ubisoft Club. Compare & Buy Tom Clancy's Rainbow Six: Siege CD Keys Active weapon skins are skins that can be currently purchased in the in-game store while all other skins may only be obtained through special deals in the in-game store or Alpha Packs. Like other customization options, weapon skins are rotated out frequently. Universal skins are applied to all current and future weapons whilst Seasonal skins are applied to all weapons available at the release of the skin. Some weapon skins, defined as Seasonal and Universal, can be applied to many weapons while each weapon has their own unique skins. They can be purchased with Renown or Credits.