Aimpoint Acro QD Red Dot Sight Mount 30mm Black. Raises height of optical axis to 22 mm. Fits on Weaver and Picatinny rail. Specifications for Aimpoint ACRO QD Red Dot Sight Mount: Manufacturer: Aimpoint Color: Black Red Dot Sights-Footprint: Aim Point Acro Optic Cut: Not Applicable Height: 30 mm Condition: New Package Contents: Aimpoint ACRO QD Red Dot Sight Mount Aimpoint 200518: Acro QD Red Dot Sight Mount 30mm Black