The Hiviz CompSight has become the standard for competitive shotgun shooters and is the choice of national and Olympic champions. The original CompSight design features an all-steel base and interchangeable LitePipes. Includes multiple diameters of LitePipes in green, orange, red, and white along with a LitePipe storage/changing key. Features: Fits most vent-ribbed shotguns with removable front bead Sight includes (5) screws in varying thread sizes to fit nearly any shotgun 3-56, 5-40, 6-48, 3mm x 0.5, 3mm x 0.6 LitePipe shape - round (4 diameters) (4) green, (3) red and (1) white (1) LitePipe