Made from aircraft grade aluminum, the Leupold Mark AR 30mm IMS designed to provide a excellent mounting option for optics mounted on the AR platfrom. The mount allows for optimal eye relief and provides the correct centerline height for a natural head position when aiming down the sight. The mount uses a 5 bolt design to ensure that the mount remains secured to the rifle during heavy use. Leupold Mark AR 30mm Matte Mount 177094