HS510C Spacer for lower 1/3, designed to extra Spacing for you to Co-witness your Iron Sights with your Red Dot Sight, Co-witnessing means you can align your dot with your iron sights.
Compatible for Holosun Optics with Compatible Shoe
The 510C Riser will raise the height of the 510C to a Lower 1/3 Co-witness height (1.63"). This riser mounts in between the 510C and the QD mount. Mounting hardware is included.