![]() Most civilian, hunting and police long guns and nearly all handguns feature open sights, while many military battle rifles usually employ aperture sights. Open sights are iron sights whose rear sight uses a notch of some sort, while aperture sights use some form of a circular hole. During aiming, the shooter aligns his/her line of sight past a gap at the rear sight's center towards the top edge of the front sight (which is usually shaped as a small post, bead, ramp, or occasionally, a ring), forming a line of aim that points straight at the desired target. Iron sights are typically composed of two components mounted perpendicularly above the weapon's bore axis: a rear sight nearer (or proximally) to the shooter's eye, and a front sight farther forward (or distally) near the muzzle. The annular shroud around the front post sight is aligned with the rear peep sight to ensure the firearm is properly trained. ![]() ![]() Aiming device Sight picture through iron sights of an H&K MP5 submachine gun. ![]()
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