Aim Sports riser mounts are designed to extend the mounting height of your red dot, reflex or optic for proper alignment and faster target acquisition. Slim, lightweight construction makes the mount unobtrusive yet sturdy in place. With 1.6" of rail space, this mount lifts your mounting surface by 0.83". Accepts all standard Weaver/Picatinny 1913 accessories. Perfect for co-witnessing with BUIS.