The H&K USP Match is a handgun that appears once in Madness Combat 6: Antipathy in the hands of a l33t agent before Hank kills him and obtains the gun. He uses it to kill the guards in the next room, before dropping it when its ammo depletes. The USP Match is also a usable weapon in Madness: Project Nexus. If you notice on the older version, the front piece is backwards.
Madness: Project Nexus stats
USP Match 10x22mm
H&K's above average performer excels in damage, capacity and range.
To view an article on the USP Match from Wikipedia, click here.