That sucks.
I hate - hate - hate airsoft gear. I also hate it more when people try and pass gear off as real, when its clearly airsoft gear.
We have a local NVG facebook group and I traded someone a spare Ops Core Bump with the Rhino Mount and MS-2000 strobe for his "Norotos INVG" mount, which he advertised as being the real deal.
Once I got it, something about how it pivoted and adjusted didn't seem quite right.. I went on the TNVC website, as well as a few other screenshot threads on ARFCOM and TOS, and notice there were a few differences. The types of screws, nuts, reflection or what I could identify as being a different material perhaps, text for the logo/model/serial etc. I went on an airsoft website after a quick google search and found the exact knock off "Norotos INVG" mount with the exact, word-for-word logo and serial number. I took a photo of it and sent it to my trader and he reluctantly agreed to meet up and exchange back. I was lucky. Afterwards, I actually sincerely believe he didn't know it was fake, given that he was willing to trade it back, but still. Easy to get burned if you dont know what to look for. I learned the hard way.