Ulako 5 Slot QD Quick Release Low Profile Picatinny Riser Mount 0.5 inch H x 2.5 inch L. Most Versatile for Use as QD Riser Immediate Conversion of Any Non-QD Mount Accessories to QD Deployment 0.5 inch of rise, Picatinny rail mount, will accommodate Picatinny or Weaver standard red dots and optics Attaches and detaches quickly and easily via integrated quick release mechanism