If you're interested in purchasing collimators for a unit or agency, please contact us directly. Note that, in order to provide you with pricing or take an order, we will need the following information: type of weapon, including caliber and barrel length; type and model of muzzle device (flash hider, muzzle brake, etc.); type of sight and height above bore; location and type of front sight post (when applicable). Including this information with your inquiry will help us respond to you more quickly and more accurately.