Easy to install and operate, these aircraft grade aluminum and stainless steel sights replace those found in the carry handle and on the gas block of all M4, AR-15, SR25 and AR10 flat top weapons. Both the front and rear sights work in conjunction with all standard height front sights and back up iron sights. These battle sights are built strong for long lasting use. The sights lock into the upright position and may be folded down out of the way by pushing a side-mounted button. Feature hard coat anodizing.