I have a Kahles CL 3.5x10x50 that is great. The Z3 erector system is not supposed to be as robust as the z5 and z6. I may just try my Sightron or grab a 3.5-10x40 vx3 and try it. Gun is 4 months away from delivery. Any feedback on Trijicon? They are light and I like the idea of the fiber optic and tritium illumination. Have no idea of their glass quality.