Bumlon Mount Riser Medium Profile Adaptor, 1/2 Inch 3-Slot Picatinny Weaver Rail Quick Detach QD Lever for Scope Optics Material: Aluminum Alloy Rail Type :Fit any 20mm weaver/picatinny base Most Versatile for Use as QD Riser Made from Aircraft Aluminum with Matte Anodizing Immediate Conversion of Any Non-QD Mount Accessories to QD Deployment