The TRUGLO Gobble dot is a universal fit turkey shotgun sight for barrels with vent ribs. The sight design is very low profile. The front sight features a dual color red and green fiber optic that is .120" in diameter. The rear sight features two green fiber optics that are .040" in diameter. Install the front, single fiber optic at the end of your barrel on the vent rib and the dual fiber optic on the vent rib further back towards the receiver to help you line up that perfect shot. This sight set is endorsed by the National Wild Turkey Federation. Adhesive tape is included for sight installation.