I sent the seller a message about the gun. Don't want to interfere in anybody's sale but thought they should know. If it were me I would sell the upper and lower seperately. I don't know what kind of liability such a mis matched gun would carry for Glock and/or the retail seller?
No response from the owner and its still for sale. If Glock had an email address I would forward them the link. Not sure they would care and not sure I care enough to make a call though.