[The Fish]

My SERPA holster for the Glock 20-21 works fine with both sizes.

It's perhaps 1/4" long for the full size and 1" too long for the compact.

I can't remember the model # but they now have a sticker on the packaging adding the M&P.

Yes, their site is not the best to navigate.



Added;

I believe the model #'s are 410525BK (matte finish)

410513BK (carbon fiber finish)

 

[The Fish]

I believe that's just a piece of packaging material but I think there is an old post about this.