I am not certain this is a real product of S&W's. The S&W home page lists a model 610 as their "Featured Product" yet all reference to places that sell them equals zero guns or pricing info.
Given that it is a 10MM revolver capable of shooting .40S&W's it would seem to be a good match for my M&P40. Also moon clip's allow much faster reloads than the other revolver approaches.
I have the crazy idea of shooting one at our IPSC matches in Payson just for kicks.