Sights—Bead and Open
Bead Sight: Simple round bead set into the top of the barrel near the muzzle of a shotgun. The bead is used only for a reference as the shotgun is pointed and moved to follow flying or running targets.
Open Sight: Combination of a bead or post front sight and a notched rear sight. To aim, you center the top of the bead or post within the notch of the rear sight and line up on the target. While shooting, it is critical that your focus remains on the front sight and not on the target.