Everyone in the optics game these days gets parts from all over the world even IF they are assembled here in the USA. I'm not a Vortex guy but I know they build SOME good stuff, these days most of the good optics come from Japan and Europe. I hear guys all the time say Leupold this and Leupold that, I have sent more of our good ole American scopes back for issues than any other and I have broke several. China can and does build SOME good stuff, all of our good ole Leupolds have Chinese glass. It's all about what a company specs and making sure quality and standards are met.

Don't get me wrong, I'll not likely be buying a Vortex product unless it is an AMG or Razor spotter but their decision didn't put a nail in their coffin yet.
future quality and customer service will determine that.