The 
NUPROL NPCog 4x32 FDE
 (Flat Dark Earth) is a high-quality aluminum ACOG-style optic designed primarily for airsoft use.
 
Key Specifications
Magnification: Fixed 4x zoom with a 32mm objective lens.
Reticle: Modern range-finding crosshair with adjustable windage and elevation.
Mounting: Compatible with standard 20mm Weaver/RIS rails.
Build: Durable aluminum construction with an anti-glare reflective coating on the front lens.