This Leica Rusan modular adapter connector is engineered specifically for seamless integration with the Leica Calonox 2 Sight and Leica Calonox 2 Sight LRF. It forms the critical interface between your Calonox 2 and a matching Rusan clamp adapter, delivering a rock-solid, repeatable connection system optimized for field use. FeaturesPairs with any Rusan MAR Adapter (30-80mm) for multi-rifle flexibilityCNC Machined AluminumInternal Anti-Rotation SystemNote: The MCR-M43P is the Calonox-side connector only. A matching Rusan MAR clamp (sold separately) is required to complete the system and mount to your daytime riflescope.