Ameriglo Tritium 2-Dot Rear Sight Features The Ameriglo Tritium 2-Dot Rear Sight uses two illuminated tritium dots to give a fast intuitive reference point that lines up naturally with a front sight in low-light or no-light conditions. Each tritium dot is surrounded by a white outline which sharpens contrast against the slide and makes the sight picture easier to acquire quickly in daylight as well. The square notch design measuring 0.165 inch wide gives a clean consistent sight picture that favors precise alignment over a rounded or U-shaped notch. At 0.256 inch in height the rear sight is dimensioned to match factory Glock specifications for proper co-witness and point of impact. Built specifically for the Glock 42 43 43X and 48 this rear sight is a direct fit replacement that does not require modification to the slide s factory dovetail. Ameriglo has built a reputation on rugged illuminated night sights trusted by shooters who rely on their pistols for personal defense and duty use. Pairing this rear sight with a matching white front sight gives a complete high-visibility sighting system across both daylight and low-light scenarios. For Glock owners seeking a reliable factory-fit tritium upgrade the Ameriglo Tritium 2-Dot Rear Sight is available for sale at GrabAGun. AmeriGlo Tritium 2-Dot Rear Sight Specifications Manufacturer: AmeriGlo Model: Tritium 2-Dot Rear Sight Type: Rear Handgun Sight Compatible Hosts: Glock 42 Glock 43 Glock 43X Glock 48 Sight Configuration: Yellow Tritium with White Outline Sight Technology: Tritium Notch Width: 0.165 Square Notch Height: 0.256 Available At: GrabAGun