This Adjustable Sight Rail is a must when upgrading to any scenario barrel. It will raise your line of sight to match the front sight while updating the look to an M-16/AR-15 type rifle. The Adjustable Sight Rail is a quality aluminum rear sight with windage and elevation settings. This carry handle style sight mounts on dove tail rail systems. Quality thumb nuts secure the Adjustable Sight to the gun and allow for easy installation.