Enhanced versions of the USP, the USP Tactical models are designed for users who need the features found on the HK Mark 23, but in a more compact pistol. Both pistols approach the precision found on the Mark 23 by adding an extended threaded barrel with a rubber O-ring, adjustable trigger, and adjustable target-type sights. The 9 mm and .40 S&W Tactical models are built on the USP 9mm/40 caliber frame.