Perhaps I'm not using the right term as my Super 91 is a W series and has 2 screws that secure the gun to the stock but the thin blade (that I'm calling the lug) is not as stout as in the model 97 that I saw photos of. I have seen a post specifically on this type of setup that this blade can be bent if shooting heavy powders especially with a lead sled setup. So what is the blade called that embeds into the stock....I thought that was the lug?