The Mark 6TM features the Xtended Twilight Lens System and the low-profile M5C2 ZeroLock elevation dial automatically locks at the zero position and provides 20 Mils of elevation travel in two revolutions of the dial. A visible, tactile revolution indicator provides immediate feedback of the dial position in any lighting conditions. ** BLEMISHED products may or may not include accessories. Image may not represent the exact product number.