Re: Simmions or BSA?
Nightforce is marketed by Lightforce Australia. Built as said before by Light Optical Works, Japan. At a guess the glass may be Hoya Japan, (does not matter where the glass is from, buyers spec the grade, coatings are more important than origin of glass, that said Schott (Germany)is said to be a more pure glass. Light Optical builds everything in house, it can be top quality stuff (a buyer orders a spec and they build what you want to the spec you want). The NXS design as far as I know is Nightforce USA.
I did talk with a Lightforce (Australian) rep at IWA 2004, we did briefly speak about Light Optical being better than Hakko, where some of the very old Nightforce scopes were built (not current models), the problems there were related to quality control as Hakko outsource.