I was talking to a friend today about a gun he saw on a recent trip he went on. He described the gun to me as a .40cal, S&W make, and the finish was "grey" and weighed as much as a "spray can". I enjoy when I have to search for gun information but this threw me for a loop. The only "grey" finishes I know of are the Gen 3 models but those are heavy and bulky. All I can come up with at this time was maybe a Sigma that got a paint job?