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.