Glock 17,19 front sight. GLOCK Steel sights provide a more robust alternative to the regular polymer sights. These sights were designed to withstand the wear and tear of frequent work with a holster. The sight has the well-known GLOCK sight pattern in white. 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.