Here is a fair review of the Arken optics. This guy does not have an affiliate code. That means he does not get paid if you buy a scope. Much as I like the other guys showing off this scope, they are affiliates.
At time stamp around 15:30 he details the same problem I have with the turret covers spinning. I have had that same problem. So, still talking about having to use some adhesive to hold in the screws or they will back out. This has happened to him in the middle of a match. I am not a competition shooter but I imagine that must also suck hard and not in a good way.
I have not had any performance problems with my Vortex optics. I have the Crossfire II 3-9X40. a couple of the Diamondback Tactical 6-24X50, and some of the Venom 5-25X56.
I also have 3 of the Arken SH4 Gen II 6-24X50 and 1 of the SH4 Gen II 4-16X50. So, I am not talking theoretical, I am talking my experience. And no, I don't have to give Vortex time to fail. Other than any equipment wearing down over time, slipping turret covers is an immediate problem and I think it is an engineering and design problem.
That being said, the guy in the review has broken or had failures with scopes way, way more expensive than the Arken. And I am not campaigning against the Arken. If the turret cover could stay on better at the same price, it would beat Vortex, IMHO.