Interesting carry method...
I have been looking at a NAA Guardian lately. Due to my work uniform and the type of work I do, I am pretty much limited to deep concealment or pocket carry.
I prefer pocket carry, for comfort and because it is much easier to get at if you need it. At any rate, It seems someone has come up with a new twist on pocket carry. (new to me anyhow)
See the attachment below.
It is just a leather holster to keep the gun from getting turned around in your pocket, but stays on the weapon when firing.
I have heard of wallet holsters, but this seems much more refined.