Fusion Thermal Rusan Adapter 51mm Features The Fusion Thermal Rusan Adapter 51mm delivers consistent concentric alignment between the rifle scope's objective lens and the attached clip-on device helping reduce parallax and maintain image clarity. Its precision-machined construction supports proper eye relief and optic balance without adding unnecessary bulk to the setup. Built for durability and repeatable performance in the field this adapter is suitable for hunting tactical and professional applications where a 51mm objective interface is required. Easy installation and secure retention make the 51mm Rusan Adapter a reliable solution for Fusion Thermal clip-on configurations requiring an objective interface for scopes with a 51mm objective bell. Fusion Thermal Rusan Adapter 51mm Specifications a fa fa Manufacturer: Fusion Thermal a fa fa Model: Rusan Adapter a fa fa Outside Diameter Fit: 51mm a fa fa Compatible Fit: Scope objective lens bells with 51mm outside diameter a fa fa Intended Use: Clip-on optic interface Rusan Adapter Fitment Chart