HiViz Adjustable Litepipe Rear Sight Glock Gen 1 Glock Gen 2 Glock Gen 3 Glock Gen 4 Black. This feature allows the shooter to change the color of the LitePipe to match the shooting environment LitePipes are made of hi-vis polymer a special glass filled plastic. Because of the plastic material the LitePipes absorb the energy from the light source projecting a thin light colored swatch of light onto the target. While shining a light onto your target the back of the Fiber Optic Sights housing contains a small magnet which holds the LitePipes in place eliminating the need to re-zero the sight. Because the light source is part of the design a single LitePipe is enough to provide all the light needed for most shooting situations. Specifications for HiViz Glock Adjustable Litepipe Rear Sight: Manufacturer: HiViz Gun Make: Glock Color: Black Fabric/Material: Steel Illumination Type: Fiber Optics Illumination Color: Green Included Accessories: 3 sets of LitePipes in Green Red and Black. Condition: New Model Generation: 4 3 2 1 Features of HiViz Glock Adjustable Litepipe Rear Sight Interchangeable LitePipe design Includes green red and black Litepipes LitePipe Diameter 0.070 Windage and elevation click adjustment Fits all Glock Models except 42 43 and MOS. Package Contents: HiViz Glock Adjustable Litepipe Rear Sight Includes 3 sets of LitePipes in Green Red and Black. HiViz GLAD211: Adjustable Litepipe Rear Sight Glock Gen 1 Glock Gen 2 Glock Gen 3 Glock Gen 4 Black