Just my personal opinion, but I would not view receiving a gun in a different gauge than that which it was listed as being Unreasonable & Nutty. If I had ordered a 20ga & simply did not want a 16ga I would certainly be upset at having to pay shipping two ways to return it when it had plainly been incorrectly listed. Certainly not all guns out there can the gauge be identified by the SN but surely the person Selling the gun would have means of determining it. After the mistake being pointed out & failing to correct the listing seems Utter Disregard to me, I'm with Jon on this one All the WAy.
