The 
Nuprol ESAT L85 4x Scope - Black
 is an airsoft replica of the British Army's SUSAT sight, designed to fit SA80/L85 series airsoft rifles. It features 4x magnification and an illuminated reticule. 
Key Features
Magnification: Provides authentic 4x magnification.
Illumination: Features a red illuminated pin with 3 brightness settings.
Adjustments: Windage and elevation are fully adjustable using the included tools.
Compatibility: Designed to fit 19mm dovetail rails, specific to SA80/L85 airsoft weapons, and will not fit standard 20mm rails.
Construction: Features a replica shape and design with a rubber eye release piece.
Durability: Some similar models from other brands feature full metal construction, anti-glare coating, and are shock, weather, and fog resistant.
Included Accessories: Comes with adjusting tools and a lens cloth.