Originally Posted by drespecki
I am not going out on a limb to say anything but I think the Viper PST scopes are fairly lightweight....
For a tactical scope this is true, but for some they may still be dimensionally cumbersome like many tactical scopes. The Zeiss with all the knobs has a slimmer profile and a few less ounces. However, there is nothing slim about the SIII with knobs on a carry rifle.
Not saying one is better than the other, just saying that if you prefer a slim profile for a carry gun, the Zeiss may be the best in that regard.