Attachment Skins are a customization option available in Tom Clancy's Rainbow Six Siege, introduced in the Operation Steel Wave expansion. Functioning in a similar manner to Weapon Skins, they can be purchased with Renown or Credits , or awarded through other means. Attachment skins come in five rarities: Common, Uncommon, Rare, Epic, and Legendary, and all attachments are applied with the same skin. Attachment skins are also applied to certain pre-existing attachments, such as the SPSMG9's integrated Reflex Sight and the P-10C's integrated Red Dot Sight. Weapon specific attachment skins will only apply to that weapon. For example, the S.I. 2021 team colored attachment skins are only available on the listed weapon. also for example Black the attachment skin is universal. And also rare as well.