The Warne® Red Dot Riser for the Holosun AEMS sight is designed to allow optics to sit on a higher sight plane on a firearm. Since picatinny mounted red dots can vary in height this mount features a spacer that allows the user to select 2 different heights based on their needs. .180 thick spacer included. – Height without spacer is 1.52 inches – Height with spacer is 1.7 inches – Designed and MADE IN USA – Height Adjustable – Includes .180 inch spacer – Designed and MADE IN USA – Weight: 3.5 oz – Fits: Holosun AEMS