Warne Picatinny Modular Red Dot Rise Mount Matte Black - 1 piece - The Warne Picatinny Modular Red Dot Riser mount was designed to offer easy height adjustments with the included spacer to fit red dot optics that use a picatinny attachment and require a riser for use on an MSR. Since picatinny mounted red dots can vary in height, this mount allows the user to select 2 different heights based on their needs. All riser mounts that Warne offers share a robust mounting base, while the top is engineered specically for different red dot styles. Height w/o insert .805" top of rail to top of riser; Height w/insert .985" top of rail to top of riser; All risers include a .180" thick spacer; Designed and MADE IN USA; 3oz;