Calibers: 9mm, 357 SIG, 40 S&W, 45 ACP. Capacities: 13-round magazine; 40 S&W and 357 SIG, 12-shot magazine; 45 ACP, 8-shot magazine. Features: Similar to the USP except the 9mm, 357 SIG and 40 S&W have 3.58” barrels, measure 6.81” overall and weigh 1.47 lbs. (9mm). Introduced 1996. The 45 ACP measures 7.09” overall. Introduced 1998. Imported from Germany by Heckler & Koch, Inc.