SZ Sigma-IV Optic

The SZ Sigma-IV Optic is an optical attachment featured in Call of Duty: Modern Warfare III and Modern Warfare III. It is available after getting the X12 to level 4 in Modern Warfare II or getting the Rival-9 to level 2 in Modern Warfare III. It can be put on all weapons that can accept attachments.
Category:Call of Duty: Modern Warfare II Attachments
Category:Call of Duty: Modern Warfare III Attachments