According to this article they do.
From the article: (NOT MY WORDS)
" Now, I know what you’re thinking: ‘Vortex PST and Strike Eagles…but those are the budget models’!
Indeed, they are Vortex’s lower end offerings compared to their Razor line. So, why were they chosen? Well, price was a factor. Speaking with one former teammate, Vortex offered them a good discount. However, that wasn’t the sole reason for choosing them. Vortex’s lower-end scopes have proven to work very well in shooting competitions like 3-Gun.
Many of my former teammates, while not really hardcore competition shooters, do take part in rifle and 3-Gun matches from time to time. However, because it’s just an occasional thing, many cannot justify spending over a $1,000 on an optic like the Vortex Razor. So, scopes like the Vortex Strike Eagle 1-6x are popular choices for many of the guys for gun matches. I myself own a Vortex Strike Eagle 1×8 optic that I purchased for 3-Gun. See see my review here.
But for combat? Well, despite what many might think of “budget optics”, the bottom line is that if they work well and prove to be reliable, then why not. After using these optics in matches and training, these guys obviously have confidence in them. During my last tour, we had one guy run a Strike Eagle 1-6x. I’ve also seen mid-ranged priced Primary Arms and Burris scopes in the field. If they had the option between a Strike Eagles and Razors being given out, I’m sure they’d all opt for Razors.
But alas, like many civilian shooters, many of these guys are family men, or they have other financial commitments, leaving them only so much money from their paychecks left to spend on gear. While seeing Vortex Strike Eagles being used in combat might make some “tactical experts” gasp in disbelief, the fact is, they’re working well, and have earned the trust of the guys using them down range."
Here the author answered some peoples questions on that article . It is arf.com but this guy is not your regular arf fudd.