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, red, and white along with a LitePipe storage/changing key. Fits most vent-ribbed shotguns with removeable front bead. Sight includes five screws in varying thread sizes to fit nearly any shotgun: 3-56; 5-40; 6-48; 3mm x 0.5; 3mm x 0.6.