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. The front sight mounts on the same plane as the rear and uses standard hardware. It is available with either a hooded or standard stem. Features: When folded the sight measures just 0.435 inches from the rail