I have the Zeiss S5 mounted atop a LaRue SR25 .308. It's a wonderful rig. The S5 has some of the best glass I have ever used, and I own a more than a few scopes. Even compared to other German-made Zeiss optics, the S5 stands apart. The turrets have a learning curve, but once you get comfortable, you'll love them. The illumination is the best I have ever seen - it's as bright or dim as you want. The reticle is perfect. I could go on and on, but I won't. I cannot think of an improvement. It's just great in every way.