HiViz Spark II Fiber Optic Shotgun Sight (Red)
The Spark II is a bead-replacement LitePipe that utilizes the proven HiViz red to achieve instant visibility on any shotgun with a removable front bead, whether plain barrel or vent rib.  Housed in a steel base and packaged with 5 different sizes of threaded studs allow it to fit nearly all common shotguns with a threaded front bead