This is a Hi-Viz Sight known as the TriComp, model PM2003.
HIVIZ(R) TriComp Interchangeable Shotgun Sight. Screw-Attach design replaces the front bead on a shotgun. Fits most vent-ribbed shotguns with removable front bead. Includes Green" Red and White replaceable LitePipes in triangular and both small and large round sizes.
Features:
Fits most vent-ribbed shotguns with removable front bead
Two green two red and two white LitePipes;Round and triangular shape
