Meprolight Self Illuminated Reflex Sight for 40mm Grenade Launchers w/Side Adaptor Black GLS M. These Red Dot Sights by Meprolight are completely self-illuminated without batteries using a light collection tube that focuses ambient light into a dot projected on the sight lens during the day and a small tritium light source for night missions. Adjustable for both windage and elevation the Meprolight GLS 40mm Grenade Launcher Sight also has built-in drift compensation for an incredibly high first-hit probability. Mount the Meprolight GLS Optical Sight for Grenade Launchers through numerous mounting options and find more success on your missions. Specifications for Meprolight GLS 1x 15mm 12 MOA Self Illuminated Grenade Launcher Optical Sight: Manufacturer: Meprolight Color: Black Fabric/Material: Metal Magnification: 1 x Objective Lens Diameter: 15 mm Reticle: 12 MOA Illumination Type: Tritium Fiber Optics Illumination Color: Red Eye Relief: 0 - 300 mm 0.4 - 23.4 in Adjustment Type: MOA Adjustment Click Value: 1/2 MOA Field of View Angle: 160 degrees Parallax: Parallax Free Lens Material: Optical Glass Optical Coating: AR Coating Light Transmission: 0 percent Operating Temperature: -40 - 131 Fahrenheit Water Resistance Level: Waterproof Length: 65 mm 2.57 in Width: 2.26 in 50 mm Height: 2.53 in 52 mm Weight: 8.8 oz Included Accessories: Side Adaptor Condition: New Magnification Type: Fixed Lens Finish: Polished Red Dot Sights-Footprint: Not Applicable Mount Type: Picatinny Attachment Type: Picatinny Range: 50 - 400 m W/E Travel at 100 Yds: +/- 90/215 MOA Features of Meprolight GLS 1x 15 mm Self Illuminated Grenade Launcher Optical Sight: Rapid Target Acquisition - High First Hit Probability Built-In Drift Compensation Always Available - No Batteries Numerous Mounting Options Compact & Lightweight Package Contents: Meprolight GLS 1x 15mm 12 MOA Self Illuminated Grenade Launcher Optical Sight Meprolight 623340: Self Illuminated Reflex Sight for 40mm Grenade Launchers w/Side Adaptor Black GLS