Look up USP in Wiktionary, the free dictionary. United States Penitentiary, a high-security type of facility within the U. USS Saint Paul, the name of more than free download USP U.
This disambiguation page lists articles associated with the title USP. If an internal link led you here, you may wish to change the link to point directly to the intended article. Design work on a new family of pistols commenced in September 1989 focused primarily on the United States commercial and law enforcement markets. The USP is a semi-automatic pistol with a mechanically locked breech using the short recoil method of operation.
This rather conventional lock-up system has a large rectangular lug over the barrel’s chamber that rides into and engages the ejection port cut-out in the slide. One of the most significant features of the USP is the mechanical recoil reduction system. This system is incorporated into the recoil spring assembly, located below the barrel and consists of a heavy, captive coil spring around the guide rod. Major metal components on both the USP and Special Operations Pistol are corrosion-resistant. Outside metal surfaces, such as the steel slide are protected by a proprietary “Hostile Environment” nitride finish.