Fusion Thermal Rusan Adapter 53mm Features The Fusion Thermal Rusan Adapter 53mm delivers 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 53mm objective interface is required. Easy installation and secure retention make the 53mm Rusan Adapter a reliable solution for Fusion Thermal clip-on configurations that require an objective interface for scopes with a 53mm bell. Fusion Thermal Rusan Adapter 53mm Specifications a fa fa Manufacturer: Fusion Thermal a fa fa Model: Rusan Adapter a fa fa Outside Diameter Fit: 53mm a fa fa Compatible Fit: Scope objective lens bells with 53mm outside diameter a fa fa Intended Use: Clip-on optic interface Rusan Adapter Fitment Chart