Nikon Monarch 3 Custom XR Turret Riflescope, 3-12 x 42mm Custom XR Turret package which allows you to order a custom engraved turret that matches the ballistics of your load Featuring MONARCH 3 Eye Box Technology with 4-time zoom range and up to four Inch of eye relief A quick focus eyepiece allows the shooter to instantly bring the reticle into focus Ultra Clear Coat Optical System for up to 95% light transmission Optimized for use with Nikon's Spot On Ballistic Match Technology