So I finally got my hands on one of the new Nightforce add-on PTLs for the NXS scopes. I installed the thing and found the fit is just crap. There's about a .100" gap where the ring clamps together, and only a couple of threads holding it shut. I was thinking this might be the wrong model, since they make two different sizes, but it's clearly marked as the right one for the 3.5-15x50, which is what I have. Kinda have a hard time believing they would design the thing like this. Guess I'll see what they have to say about it at NRA next week.