Improve the performance of your Glock with the new adjustable rear sight. Our bright and fully adjustable rear sight will enhance your confidence and shooting experience.Specifications: Part number GLAD211 Interchangeable LitePipe design Includes green, red and black Litepipes All steel construction LitePipe diameter 0.070 Windage and elevation click adjustment Limited lifetime warranty under normal conditions and proper use of firearm Fits all Glock models except 42, 43, 43x, 48 and MOS.