This is a Hi-Viz Sight known as the Birdbuster, model BB2005.
HIVIZ(R) Bird buster Magnetic Shotgun Sight. Includes three sight frames to fit a variety of shotgun rib sizes from 1/4" to 3/8". Includes two Green and two Red replaceable LitePipes in round and triangular shapes.
Features:
Magnetic front sight for shotguns
Interchangeable LitePipes
Includes two red and two green LitePipes
