Why a NES Zapper and not just any old gun? If you can't actually use it to play Duck Hunt then maybe you could file a claim and get a refund. Free Cheeto!!
That one is a repro. If you zoom in you can see that those are actually cheese flakes and not cheese crumbs. It's a simple Chinese knockoff but easy to fool the untrained eye.
It takes years of experience and you basically have to have a basement full of Cheetos in acrylic cases that have a net worth of let's say.... atleast 675k to even have the right to comment on such a holy grail of topics. You should all be ashamed. Stay in your lane.