One of my closest friends had a USP 9 compact that he wasn’t carrying. Turns out the holster he had were either uncomfortable or too obvious to observers.
Enter Sideguard holster and mag pouch. Problem solved. I borrowed that USP for a few days and, several time, had to check that the holster was actually in place. With a sturdy belt, the weight was that imperceptible. Concealment was also top-notch, with the gun and magazine invisible under just a tshirt.
I have a Sideguard OWB holster for my Boberg. Nicely made, good service. And there aren’t many who make holsters for that gun; several outfits I contacted said either “no” or “not yet”.
The right holster can make anything carry well. The wrong one can make anything fit badly and uncomfortably. USP Compact is easy in the right holster.