The reticle "GRID" if you will, is designed in Mils and 1/2 Mils increments for maximum precision. It has 15 mils of elevation markings and 20 Mils of windage markings: 10 Mils to the left and 10 Mils to the right. The upper half of the image was purposely left open, to offer a clear and unobstructed field of view.