The Strike Iron Sights (Standard Height) give you the best affordable option so you can throw away those plastic (GLOCK™) or boring OEM steel sights. Designed to help with proper sight alignment and keep the shooter's eyes focused, there is natural light that is seen on both sides of the front sight between the u-notch rear sight. Steps placed in the rear of both sights help angle and reduce unwanted glares or reflections out of your eyes. Lines and angles designed to use natural light reflections and shadow play to keep user's eye aligned and focused on the target. The rear sight is designed with a negative angle so that the shooter will see the back wall as dark as possible to give total focus on the sights. The line running down the middle of the rear sight is there to catch light from above and create a "line" illusion in which the shooter can use it to assist in aiming. The front sight can be painted to user’s color preference or use glow-in-the-dark paint to customize the look and use of the sights. Made from SUS630 hardened stainless steel, the Strike Iron Sights (Standard Height) is engineered to be as robust as possible while giving you one of the most budget friendly options on the market. DISCLAIMER: -Recommended maximum torque value for front sight screw is 7 in/lbs. -Strike Industries wants to provide the best fit possible. Not all slide rear sight dovetails are made equal, especially the many aftermarket options out there. Strike Iron Sights are semi-drop-in and may need to have some light filing to provide the most universal and proper fitment. Please watch the installation video in the MANUAL/VIDEO section of this product page. Fits the following Models: GX4 / G3c / G3X / G3