Troy Front Folding Battle Sight – HK Style, M4 Post – This Troy front folding battle sight replaces carry handle sight on all M4, M16A4, SR25 and AR10 Flat Top configured weapons. The Troy Folding Battle Sights have set a World Standard for design and quality by which all other Back Up Iron Sights are judged. They are easily installed and position the apertures at the exact same height as the factory sights. With no levers or springs to fumble with, deployment of the sight under stress is easy. The robust stainless steel cross locking system ensures your sights will remain up and zeroed in the most extreme combat conditions. All Troy Sights feature a zero-canting attachment system for use on all military and aftermarket receivers. No tools are required for adjustment. The sight is easily installed and operated. Deploys by pulling up without any levers, buttons or springs. When ordering, specify: Black or Dark Earth.