FCW RMR Style Red Dot Doctor Sight with G17 Picatinny Rail Mount (BK)
 
RMR style 
Magnification: 1x 
Illuminated Type: Red 
Material: Metal 
Specifications: Lens Dimension: 23mm x 16mm 
Come with 20mm mount and Marui G series rear sight replacement mount
with polymer box
Perfect for rapid-firing or shooting of moving targets 
Fully adjustable at windage and elevation 
Standard Side On / Off switch