Just got a 9L CORE, and went holster shopping. Other than the Black Hawk, the other holsters mentioned above are not found locally.

I discovered that there are two Blackhawks made for the M&P, which "look" similar in the packaging, but one will NOT work.

The one I got has 513R as the last part of the model #, and cross fits a set of Glocks, starting with a model 20. As you can see, the tall sight is inside the holster. The other model allows the sight to extend beyond the holster, and snags on the way out.