The Heckler and Koch Universal Service Pistol in 9mm Parabellum is the standard full-size variant of HK's polymer-frame service pistol line. The USP introduced the O-ring barrel bushing and buffer system designed to reduce felt recoil and extend component life. It was developed partly as a candidate for US special operations adoption and achieved that goal with the SOCOM program. Type: Pistol Action: Semi-Automatic Caliber: 9mm Parabellum Capacity: 15 Year introduced: 1993, Germany Weight: 27.2 oz Overall length: 7.64" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Civilian Defense