The Vortex Viper 3-9x40 Dead-Hold BDC riflescope is a versatile, durable optic with fully multi-coated lenses for high light transmission, making it ideal for hunting in varying light conditions. Its key feature is the Dead-Hold BDC reticle, which uses customized hashmarks to eliminate guesswork for hold-over and windage corrections at different ranges. This scope is built to be rugged, shockproof, waterproof, and fogproof, with premium features like an aircraft-grade aluminum tube and a smooth-operating erector system.