I don't think it is a unicorn o ring but I wanted to go to the source and see if I can get an O Ring from Umarex. The Umarex rep said there was no o rings in stock but we'll just replace your gun with a new one, so why not right? Thus which is why I did go forward with shipping in my air gun to Umarex. It's the o ring on the air gun body side. When shipped, I even placed a note stating the O RING is cut thus leaking air when I had it but looks like all of that was ignored, which Mason had no explanation and kept saying "Our 20 year experience gun smith would have not had that happened". Overall, I'm just upset that they straight up lied to me and wasted my time.
I asked Mason to look at their history notes of my ticket/case to see who I originally spoke to who said I'll get a "New" Zelos and Mason just kept saying, there's no other notes. The only notes were from the gun smith stating "Nothing wrong with the air gun". Total BS. I call BS because the first rep that was suppose to email me the shipping label forgot to email it to me. I had to call back and and spoke with another rep and he was able to pull my case/ticket, verify the notes, my identity, and was able to resend the shipping label to me.