The Leupold Mark 4 ERT long range tactical scopes are among the elite long range scopes on the market. Every Leupold Mark 4 scope comes with the rugged construction and waterproof ability users have come to expect with Leupold products. All Leupold ERT Scopes also feature a wealth of fine tuning adjustments including windage and elevation adjustment. In addition, every Leupold scope comes with their Golden Ring Lifetime Guarantee, so if the scope doesn't perform like it is supposed to, they will either fix it or replace it to make things right. All Mark 4 scope ship free, so order yours today!Receive FREE Ground Shipping on all orders over $39.99.