I just mean it's such a minor detail that I can't imagine why someone would want to swap it on purpose, if he wanted it silver he could have even used a paint marker instead of switching the guns and trying to rip someone off. All I mean is that maybe it was just a mistake and he did it by accident.
Of course you should get the original accessory because that's what you believe you purchased. So he needs to do something about it.
If you had it shipped then yeah it's probably not worth it to send it back, so I would just ask for a small refund. Hopefully he can find it though.