Maybe the Lightest Pistol Red Dot Sight in the World Only 12.4g 0.44oz Weight
Engineering Polymer Housing in Rug Construction Designed for Real Firearms
Standard Window Size 16x22mm 0.6x0.9", Automatic Light Sensor, MAG-S Footprint
50,000 Hours for Weakest Visible Dot, IPX4 Water Resistant, w/ Weaver Mount