Eh, it used to be you were paying for ruggedness, glass, and repeatable precise tracking. Now you’re paying for glass and tracking more than ruggedness. Holosuns, and hell even primary arms LPVOs will take a beating. The world of optics has changed in the past 10 years.
Sometimes you’re paying for extra ruggedness, like with Nightforce, ACOGs, Leupold Mk6es, or the Vortex Razors. But then you also have people paying extra for Kahles scopes, which are actually fairly delicate.
I’ve got a Nightforce, Trijicons, and an aimpoint, but I would absolutely be confident bringing a Holosun 507/508/509 on a deployment as an offset red dot. I’d also feel confident with a Holosun 515, but prefer an Eotech when I have a constant supply of batteries like in the mil. In fact I’m planning on using an offset 509 if I get orders any time in the near future. And if I didn’t have the funds for a better scope, I’d also be fine with bringing a Primary Arms 1-6 Slx or GLx, or a Vortex PST. The PST has seen some serious use and abuse overseas with ODAs and SMUs. But even with funds, I’m looking at the Vortex Razor Gen III for use if I need it on deployment. And that’s with being able to get the Razor Gen III and ATACR for close to the same money. I’d still choose the Vortex. So... deploying with a Holosun and Vortex, yeah I’d be confident.
On the flip side, while a high end optic like Kahles has great glass, I would definitely not bring it overseas.