GLOCK Steel night sights are fitted with a small tritium element, glowing green in low light and set in white contrasting dots, which means they will be illuminated in low light conditions without the sight needing to be exposed to a light source first. The rear sight is mounted to the slide with the help of the GLOCK Rear sight mounting tool, which allows you to easily swap the sight for one of a different height or type. The front sight is screwed on and it is available in two different heights. Changes of elevation or type are made by switching out the front sight. The GLOCK Front sight mounting tool is recommended for installing the sight.