I've yet to see an Ptika6 worth a fhuqk. None of mine would track,hold zero or repeat...but of course I'm not a shill and bought same with my own money. Hint.
In regards to Arken,I've only (10) or so of the Gen2 4-16x FFP Mil/Mil's and they are simply fhuqking exceptional. The reticle is killer,there's 35+ Mil's of erector,the zero stop do just that,parallax control is 10-ish yds and forgiving. Hint.
Though I'm talking exceptional rifles,most of which are Custom and I shoot more than a "smidge". Hint....................