With out seeing the back of the mag, My guess is that it is a ten round mag that has been glued to plastic formed shell, or made up completely of plastic.The center section of the mag has what appears to be glue marks where the real mag touches the plastic case.
Either way, some guy is going to be thrilled, or real pissed off. My guess is the latter.
Also, The seller clearly states that it is not a "C beta mag", so the buyer has no recourse getting his $175 back. Since the mag is only shown in the rifle, with out different angles of the mag, there is no deception on the part of the seller. As a seller, this guy is good. He has stated just enough for someone to think that the mag is more that it is, yet not enough that he has made any false statements. I give it a solid 8, in regards to scams.
Like they say, theres a sucker born every minute.
P.S. we can e-mail the buyer after he gets the mag and see how it turned out. Anyone want to take bets on how pissed off he is going to be after spending $175 on a piece of plastic.