This is truly the next generation of CMR tactical scope technology - loaded with advanced design features that truly put it in a class all of its own. So, what sets this scope apart from the first generation Hi-Lux Optics CMR? Many tactical shooters shared that they wanted the windage adjustment moved to the left side, and that's exactly where you'll find it on the CMR4. It allows the right-handed shooter to make windage adjustment without taking the scope off of the target...or finger off the trigger. Both the windage and elevation turrets feature our "ZRO-LOK" System, which does exactly that - it locks windage and elevation alignment in place, while still allowing minor adjustments to be made in the field, then being able to return to exact zero. Tactical shooters across the country are now recognizing this system as the best available today. Each click of either turret gives 0.1 Mil adjustments, with 8 Mils per full turn of the turret. The CMR4 also comes with protective screw on aluminum turret. The advanced illuminated reticle provides more information to the shooter for quickly assessing the range of an intended target, and to allow for the trajectory of 5.56mm (.223 Remington) or 7.62mm NATO (.308 Winchester) rifles out to 600 meters. In addition to the vertical BDC aiming points, the reticle also includes Mil scales on both the vertical and horizontal lines. The Illumination rheostat now includes three night vision settings.