This Swarovski X5 3.5-18x50 riflescope with 4W reticle features newly designed turret and inversion systems built with stainless steel components, a patent pending spring retention and lever system, 80 clicks per revolution, rugged main tube with built up wall thickness, elevation turret with viewing window, subzero allowing 40 clicks below a pre-set zero, parallax correction from 50m to infinity, and Swarotop, Swarodur, and Swaroclean coatings. Swarovski X5 3.5-18x50 4W Riflescope Black 79013