Operator Mod

Operator Mods are a type of attachment available in Call of Duty: Black Ops 4. Operator Mods modify a weapon's behavior in a fundamental way, to a greater degree than regular attachments. Furthermore, Operator Mods require a special Wildcard in order to be equipped.

Overview
Not all weapons have Operator Mods available, but all available Operator Mods tend to emphasize some aspect of a weapon's design. For example, the Cordite's Belt Fed Operator Mod emphasizes the weapon's large magazine capacity by giving it a 600-round magazine.