Slab Side Revolver? I was under the impression it was for the SSR division of IDPA. (Stock Service Revolver) That is what the Smith and Wesson website is promoting it for. I shoot in that division with a 629 44 mag.
SSR is kind of multi-purpose with revolvers. The S&W web does tout Standard Service Revolver whereas my catalog refers to Slab Side Revolver. Does it matter? Not really. Both references are correct.