The USP Expert. 40 S&W, was introduced in 1998 and includes all the features of the Tactical, with the exception of the threaded barrel. The USP Expert also retains the USP match trigger. It also features an extended steel slide, which mostly hides the longer O-ring barrel and adds weight to help reduce muzzle flip and felt recoil even further. The Expert has adjustable target sights similar to the USP Match, Elite, and Tactical, however the slide differs in that the rear sight seat has been milled lower. The Expert may be used with an extended magazine well, or jet funnel, in 9 mm and .40 S&W calibers, which is intended for use in conjunction with larger-capacity magazines. The Jet Funnel magazines are clear plastic and hold 18 rounds for 9mm, and 16 rounds for .40 S&W. The jet funnel magazine can be used without the jet funnel installed and will protrude slightly from the bottom of the magazine well. However, once the jet funnel is installed, only jet funnel magazines can be used. The standard USP magazines will not work as the funnel will impede them from fully inserting in the grip and locking into place. The bobbed hammer was a factory option for the Expert if it was to be used in IPSC for the Standard Division, as the original version "in its ready condition" did not fit the box for Standard division in IPSC.