I am having some issues with my SH4 6-24x50. I can’t get all the parallax out of it. I’ve focused the diopter to my eye 10 different times. When I go to my target and adjust the side focus I still have reticle movement when I move my head around. It’s getting pretty frustrating. It shows in my groups as well. I know these aren’t $1000+ scopes… but I have Vortex (same price point as arken) and Nightforce scopes that I don’t have any issue with.