No, but I do have a couple of MI SS Gen 2's, a 12" and a 15" and love them. They're light, comfortable, and slim. The keymods may be lighter, not sure whether they would be more comfortable or not. Certainly not worth it to me to replace them. The 15" SS did replace a T-series 15" that was just too much. The only full quad rail I have left is on a Colt 6940, replacement is not an option, but that one has a Larue FUG on it that will always be there.
I also like the MI forearms. A lot has changed in the years after I bought the YHM Diamond. lol