This fiber optic shotgun sight from HIVIZ installs onto standard barrel ribs; perfect for any of the shooting sports or for upland game. Just remove the original front sight bead and replace with the HIVIZ front sight, selecting the correct screw for your application. Fits most vent-ribbed shotguns with removable front bead. Sight includes five screws in varying thread sizes to fit nearly any shotgun: 3-56a ^2; 5-40a ^2; 6-48a ^2; 3mm x .5; 3mm x .6. The sight is held in place by a single screw. Includes mounting hardware and a fiber optic light pipe. FeaturesImproves visibility is all lighting conditionsIncreases awareness of muzzle locationFast target acquisition