The suppressor design is not compatible with shotshells that use non-typical wads, along with slugs that do not use wads and rifled slugs. Dimensionally, the Silencer Central Banish 12 measures 8. ...

Unlike some of the blueprints and weapons, it is not locked behind the High-Value Target reward. It means you need 1 Battle Pass token to claim Monolithic Suppressor after you reach Page 7.