The Lethal Lead Dead Zone Shotgun Sight (Red) is designed for hunters ranging from beginners to experienced and a great tool for teaching how to snap in on a moving target. It is designed to fit any Single Barrel Shotgun Gauge to help you determine the proper distance to lead a duck for an effective shot. The average shot on a flying duck is made from a distance of 30 to 40 yards. So, no matter which angle they approach from, The Lethal Lead Dead Zone Shotgun Sight (Red) you’ll have the proper extended sight to make a clean shot. This sight has been calibrated to provide the proper lead for Ducks, Geese, Deer, Pheasants and Trap Shooting. All of this is made in the USA!! Free Shipping on all orders!