The new Leupold Mark AR Mod1 Scope squeezes every millimeter of accuracy potential out of your MSR/AR or bolt-action rifle. Multicoat 4 lens coating directs more light to your eye and minimizes reflections off lens surfaces. Fast-focus eyepiece helps you get on target faster. Precise 0.1 Mil click adjustments for windage and elevation. Second generation Argon/Krypton gas for shock-resistance and amazing waterproofing. Machined from aircraft-grade aluminum for the ultimate in durability.