TriComp brings pinpoint accuracy to target acquistion. This innovative interchangeable design is loaded with options, equipped with both triangular and round LitePipes in a variety of colors and sizes. Any hunter or shooter can create a sight picture that suits their specific needs. 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.