The Night Fision GLK001003OGZ brings unprecedented daytime visibility to your Glock, thanks to its use of an injection molding process and military-grade polymer mixed with robust polymer tritium outlines. Exceptionally flexible, the product only uses tritium vials imported from Switzerland. The remainder of the Night Fision product line is proudly manufactured entirely in the USA.Our night sight set includes a square front green tritium with an eye-catching orange outline, alongside a square rear green tritium. It\'s suitable for a wide range of Glock models, namely the 17/17L/19/22/23/24/25/26/27/28/31/32/33/34/35/37/38/39.