Developed by Heckler & Koch(
coke) of Germany. Stands for Universale Selbstlade Pistole or roughly tranlated self-loading pistol/semi-auto. Introduced in the early 1990's in the .40S&W caliber at first then the 9x19mm and finally the .45ACP. The .
45 ACP model is the result of the Mark23 Model 0 which is also a .
45 caliber.
There are many varients of the pistol. The tactical model in CS which is a .
45
The compact series which also includes a .357 sig caliber which uses sig's
bottle-necked rounds
USP Match, Expert, Elite, P8, P10, P12,
P2000, and the P2000 subcompact.