Hi ya Matt!
Had a 16x mk4 with the m1 turrets, mil-dot; and still have 2 other 10x's and a 6x. Yessir, they are tough! Not really too likely that either the Mk4 or the NXS is gonna have matched turrets, or FFP; except the new ATACR series of NF. But I haven't kept up with them.
If talking about "matching up", the Cronus BTR is said by those who've tested them to be a "match" for S&B P-M and ATACR, Kahles which is Swarovski mil-spec, and basic Hensoldt. The Cronus BTR is made at the Light Optical Works. Home of March, NF and other premier brands in the tactical and precision shooting optics realm.
I spent some time, yesterday, making a precision spacer for my $369 ArgosBTR, and darned if that scope does not now have a decent Zero-Stop.
I dunno how many guys here are shooting "Precision 50BMG", I always liked the value and features on Leupy Mk4. I have 5 of them still. Did get rid of both my Vortex Viper PSTs which I thought were a right there with the variable Mk4s. The Argos BTR is right there with both. I sold my NF NXS 8-32x 56mm almost 10yrs ago. Too heavy, compared to Mk4 variable that I owned, not the best reticle, and optics weren't that wonderful. I did work as a photographer and so evaluate optical performancde of rifle scopes from that background, all the while remembering they are first and most critically, rifle sights. I also owned a 2.5-10x 24mm NXS and it was okay, not phenomenal. In fact, Not Phenomenal is a good description of my NF experience. Cost me about $3000 to learn most shooters raving about their optic qualty, know nothing about optics.
Kind of always a coarse, throw down the gauntlet, interaction from you; no matter the topic. Were you a marine sniper? Work for some PD now? The Federal guys are usually more polished, but they have so many employees at arms. Would not be surprised if the Smithsonian national library didn't have a sniper team and SWAT squad that specialized on "in the stacks" interventions...
But anyway, I do recall one guy who is a noted sniping instructor remarking that "only S&B P-M scopes could take being left on a car's dash or out in direct sun during July or August in So. Texas. Does get hot there... There's all sorts of tests. Probably some you never thought of. Shooting with precision support gear at targets that don't move or shoot back is really some pansy stuff. At least the Palma, HP and SR guys have to hold hard and shoot unsuported. Tell me about holding your 50bmg Barrett with a 1917 sling while your reticle dances like a dervish.