Page 15 of the Shield manual reads:Unknown if CA will accept the view hole as a loaded chamber indicator or if an actual LCI has to be added. Now all you need is for S&W to start manufacturing them for you.
Bob
So I'm guessing this is the style that will be sold in Cal.Type 2: Some M&P Shield™ model pistols are equipped with a tactile loaded chamber indicator. This indicator is present on the top of the slide. When the chamber is empty, the loaded chamber indicator will be flush with the top of the slide. When the chamber is loaded, the front of the loaded chamber indicator will protrude from the top of the slide where it can be felt above the slide's surface (FIGURE 13b).