CNC machined sight post has integral crosshairs to provide quick, consistent sight alignment for improved accuracy at any range. Large diameter aperture offers a wide field of view that does not obscure target; gives a sight picture that's like looking through a scope. Compatible with factory rear sights and variable-diopter target sights. Non-hooded AR-15 sight is .082" thick. Hooded sight has .250" hood that shields crosshair from reflected light, offers greater crosshair protection for extreme duty use. STD, thin wire crosshair. AR-15 available as Hooded or non-hooded, fits M-16 and AR-10 rifles with standard sight housings. L1A1, FN-FAL and 3/8" sights are Hooded. 3/8" Dovetail fits common hunting rifles plus, provides a quick, on-target sight for the 10/22. M1 Garand and M1A require modification of front sight, removal of sight blade.