Temporarily out of stock. We are not likely to get more in until after christmas. Contact us if you would like to be informed as soon as they come in. This king of all top rails is adjustable for windage and elevation and has illuminated integral iron sights that can be used even when an optic is mounted. You can take advantage of the adjustable nature of this top rail two ways. You can sight-in the rail so its iron sights are dead-on, or you can sight-in your optic by adjusting the rail. (When you adjust the rail and not the optic you have the possibility of sharing optics between weapons as a modular component). We've tested this rail extensively in the shop and in the field. It holds a zero through all temperature ranges while withstanding multiple impacts from various directions. The iron sights are adequate for hitting cans at 50 meters.