The SIG SAUER P320 (FULL/M17) OWB Covert Kydex Holster has been one of the purchases I've ever made. It fits the weapon like a glove and is extremely comfortable to wear. It's streamlined design is not only practical and fully effective for carrying/drawing the weapon, but it is also solid from an aesthetics perspective as well. You'd do no better than this holster for your full size P320.
shipped fast and I like the quality
My gun fits perfect. The tension is just what it needs to be. Holds it in place no slipping out.
I am very pleased with this holster, it is easy to attach and I've had no issues with retention. Drawing from it is easy and smooth
Best fitting holster for the polymer 80 pistols