VANTAGE 4-12×40 AO RIMFIRE .17 HMR 11 layer fully multi-coated optics for excellent clarity Adjustable objective for parallax correction 1 inch mono-tube chassis for superior strength Glass etched reticle with red and green illumination Rheostat on saddle offers 5 levels of brightness ¼ MOA low profile no-snag fingertip turrets Fast focus eyebell and high torque zoom ring