The AmeriGlo GL820 is a Trooper sight model specifically designed for the Glock Gen5 20/21. This high-quality sight system features outstanding characteristics for improved aim and accuracy.The front sight houses tritium in a green color, which is encapsulated by a bright lime green outline facilitating rapid sight pick-up. This smart design enhances visibility, especially in low light conditions.The rear sight is another standout feature for this model as it incorporates a square posted frame. It consists of a dual tritium sight, enabling clear and precise aim. In addition, it comes with aggressive serrations on its rear face, delivering enhanced grip and adjustability for performance precision.