This Kensight Ruger Mark II / Mark III Rear Sight is Fully Adjustable for both Windage and Elevation, and is an excellent upgrade over the factory rear sight to help wring the maximum amount of accuracy from your pistol. Manufactured to the same exacting standards as Kensight's 1911 rear sights, these are Wire-EDM machined from 4140 Chrome Moly Steel and heat treated to a hardness of RC 38-40 for a tight part-to-part fit and long-lasting durability. Click-adjustments are positive and precise, allowing for reliable and consistent point of impact changes. This Rear Sight is equipped with a classic Square Target Blade that is Fully Serrated for reduced glare, and presents a crisp, uncluttered sight picture that helps a shooter to quickly and precisely align the top of the front sight post with the well-defined top edges of the rear sight notch for superior accuracy. This design is ideal for use in Bullseye or similar competition where accuracy and consistency are of utmost importance. ...