In the smithing sticky...
Smith & Wesson revolver terminology
When discussing S&W revolver parts, it's best to know what each part is called when dealing with ordering or explaining problems. This is out of an old 29-2 owners manual. The part names haven't changed over the years.
http://img.photobucket.com/albums/v5...partspage1.jpg
http://img.photobucket.com/albums/v5...partspage2.jpg