YHM YANKEE HILL MACHINE REAR SIGHT AR15 QDS 5010

YHM's Quick Deploy Sight System features an automatic deploy system that springs the sight up with the push of a button. Both front and rear sights lock positively in the folded and deployed positions and are made from aircraft quality aluminum and Hardcoat Anodized matte black to Military Specifications or better. When folded the sight measures just .435 inches from the rail. Manufacturer Part Number: 5010