I'm betting that there is some confusion about which feature was meant for the "only 2 made" comment.
There was a discussion on AR15.com from
@USMCSGT0331 about some 4-16s with prototype turrets, and one of those was the ultra-rare one. I've seen the Secret Service turret on multiple rifles.
His photo, top scope:
View attachment 8460292
What people don't really realize is that NightForce has made hundreds (or more) different scopes in different configurations for militaries/government agencies in countless different countries. I've personally owned at least 2 dozen+ different NightForce Mil-Spec scopes, and that's not even scratching the surface of what they've made in the past 2 decades. The Secret Service spec'd out their NightForce ATACR's the way they wanted them, and that's that. Their specific configuration might not ever be available for sale to the general public, unless they have some overruns or it turns into a model that is highly in demand and fills a major role on the civilian side. The Secret Service scopes are just a single example of the literally countless configurations that they've made for governments around the world.
The two 4-16x NightForce Mil-Spec ATACR scopes in my photo in your post are completely unique. They're both prototypes for the CSASS contract and weren't selected, so there's only these 2 prototypes. I gave the top scope to a very close friend, and he sent it to NightForce because the top piece on the elevation turret wasn't functional. NightForce offered to give him just about any scope they make in trade for that prototype. The guys who are currently working at NightForce have never even seen that type of turret before and they actually didn't even want to work on it, so they just sent it back to my friend (who took it apart and fixed whatever was going on with it).
As for the "only 2 scopes" comment, it's not referring to these 2 scopes. NightForce has produced tons of prototype scopes that are complete one-offs like these 2 scopes. They've also produced 2, 3, 4, 5, 6, etc. number of prototype scopes (whatever they need for a contract submission). The NightForce Mil-Spec NXS 2.5-10x24 on my Mk14 Mod 1 clone is 1 of 6 scopes made in this specific configuration (reticle in these 6 scopes is unique to these scopes) that they sent to Crane NSWC for the Mk14 program:
So, don't get too hung up on seeing a scope configuration that you've never seen from NightForce before. There's literally hundreds of different NightForce prototype and issued scopes that none of us have ever seen. The elevation turret on the Secret Service JAR scopes might be a configuration that's not available to the public. The could have made 2 scopes in a similar, but different configuration as test scopes for the Secret Service, and then the SS told NightForce to make a specific change and that's now the current issued scope. That's exactly what happened with the Stiller Mk13 receivers when they submitted the first 25 receivers to Crane. Changes were made and then you have the production run of issued receivers. The 2 scopes that were previously mentioned are probably just the samples that were submitted (which still doesn't have anything to do with my 2 prototype 4-16x scopes), and then they made these issued scopes with specific changes. The change might not even be external, it could be internal like the reticle. There could be 2 sample scopes submitted with that specific elevation turret, then a change to the reticle and then issued. There would still be the 2 specific sample scopes and there would also be these issued scopes that look just like the 2 sample on the exterior. So, what was said earlier in this thread is correct about only having 2 scopes made, as well as being correct with more scopes being made that look similar to those 2 sample scopes.
I hope that this makes sense, I described things the best I could. I don't know the exact configuration of NightForce scope that the Secret Service is currently using in these photos. I'm just explaining why there would be 2 samples made and how there's countless prototypes/samples/test scopes and countless issued scopes that we never even see or even knew existed until a photo pops up.