Vector Optics Victoptics SRD 1X16X20 Pistol Red Dot Sight

Key Feature 7075-T6 Aluminum Alloy Construction (Lightweight) Ultra Compact Reflex Sight with 16x20mm Window, Perfectly Sized for Pistol without Adding Bulk Light Sensor Can Automatically Adjust Illumination Intensities Based on Lighting Conditions 50K Hours Battery Life Provides Over Two Years of Reliable Use, Minimizing Battery Changes Window Lens Size: 16x20 mm / 0.63x0.79 in Parallax: Free (<2MOA) Parallax Setting: 25 yards Dot Size: 3 MOA