While I think that it is a bummer that the gun was not what you expected and you may have invested in shipping costs to find out I don't think that there is much more of a story here. The gun arrived on a friday. Within three business days your money was credited to your card. Not exactly great on the part of CSMC considering the the gun, from your description, was not as described. I am more concerned that the gun was so different from the description than the fact the it took longer than you wanted to return the money.
Bill G.