In 1855 William Malcolm started building the first production riflescopes in the world. For 40 years the U.S.Army has been contiunously using Leatherwood ART scopes. Our new patented Uni-Dial system is the first vertical adjusment system that allows the shooter to easily set his own range reference marks or to use one scope for several calibers. Our No-Math Mil-Dot ranging reticle eliminates the need for the shooter to do math computations to determine the range to the target using a mil-dot reticle.