NcStar 1X20 MP5 Red Dot Sight / HK Claw Mount (DMP5) LED (Light Emitting diode) 100% safe for the eyes Anodized Aluminum body Seven position rheostat knob for multiple brightness settings Unlimited eye relief and field of view Made by NcStar Red dot sights Measures 3 2/5-Inch long and weighs 5 1/2 ounce