The BEST xtra for the P-11 is the factory made stainless pants clip.
I wear shorts 8 months of the year and carry with the "t" shirt over it.
In the last 10 years, I have had to stop shoplifters 4 times at our local Walmart. They would not stop for the door security person, and passed by me as I saw it happening.
They stopped for me as directed,, and assumed the prone position.