The grooved "aiming groove" on the Labradar leaves much to be desired. This Improved Labradar Sight changes that. Simply remove the bolt just below the groove, and slide the sight into place, and install the included longer bolt for a semi-permanent installation. You can also put the sight on your Labradar only when in use, it won't fall off while stationary. Compare this to similar Labradar sighting options and you will find our quality to be superior, guaranteed. Printed from our custom Carbon Fiber/Nylon copolymer. Ultra lightweight, and will withstand more abuse than your fancy chronograph!