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 0.435 inches from the rail. The front sight mounts on the same plane as the rear and uses standard hardware. This is the hooded stem sight set. This set is comprised of YHM-5010 & YHM 5030 H.