EDEMO TruGlo TFX Glock Low 17/19/22/23/24/26/27/33/34/35/38/39 Green 3 Dot Sight TG-TG13GL1A EDEMO1. The fiber optics of these Tritium Pistol Sights from TruGlo use ambient light and carry most of the load during the day while the tritium glows...