This is a Hi-Viz Sight known as the Interchangeable, model PM1002.
HIVIZ(R) CompSight(R) Interchangeable Shotgun Sight. Screw-Attach design replaces the front bead on a shotgun. Fits most vent-ribbed shotguns with removable front bead. Includes four Green" three Red" and one White replaceable LitePipes in four diameters.
Features:
Fits most vent-ribbed shotguns with removable front bead
Four green three red and one white Litepipe;Round shape
