![Cyber Monday](http://combatoptical.com/images/deals/BFCM_Deal_CyberMonday.jpg)
Crazy Cyber Monday Sales @ combatoptical.com
Front and Rear QD AR15 M4 Iron Sight.
Iron sights are a system of aligned markers used to assist in the aiming of a device such as a firearm, crossbow, or telescope, and exclude the use of optics as in a scope. Iron sights are typically composed of two component sights, formed by metal blades: a rear sight mounted perpendicular to the line of sight and consisting of some form of notch (open sight) or aperture (closed sight); and a front sight that is a post, bead, or ring. Civilian defensive, hunting, and police firearms usually feature open sights, while many military battle rifles employ aperture sights. On many firearms the rear sight is adjustable for elevation or windage.