I am seeing these new models pop up on GB, assuming the FS means fixed sights. Looks like a combat rear and also comes with different grips. Descriptions are saying rubber grips on all of them (all using stock photos like this one), but picture shows different. I think this setup is a better option for me in my P-01 search.
If you dig a little, the item details list the model number as a 91199. That is a standard P-01 w/14rd mags. If you are buying a new CZ,
always go by the model number and nothing else. There's no such thing as a P-01 "fs". As others mentioned, the pic is of a CZC SDP. I'd say the seller is being more than a little "creative". I wouldn't trust them even a little bit. It's not that hard to find a P-01 through normal channels.