The Walther GSP (from Gebrauchs Sport Pistole, "Sport Pistol for Standard Use") is a German-made semi-automatic target pistol chambered in .22 LR or .32 S&W Long.
The GSP is a precision target shooting pistol based on the earlier Walther OSP. It was introduced on the world market in 1968, originally chambered for the .22 Long Rifle cartridge. At the end of 1971, Walther began offering the pistol in .32 S&W Long Wadcutter as well. Conversion units for both calibers are available and easily interchangeable. The anatomical, adjustable walnut grips were also available, on order from Walther, for left-handed shooters. In 1988, Walther introduced a fully adjustable (for pull, stop, and angle) two-stage trigger that athletes could retrofit their pistols with. Today, a more accurate version of the pistol is available, known as the GSP Expert, which has a vibration-absorbing plastic sleeve around the barrel.
The Walther GSP is a popular choice for the various 25 m pistol shooting events governed by the ISSF, some of which are contested at the Olympic games — the .22 LR variant was used for the 25 m Pistol (formerly "Sport Pistol") and 25 m Standard Pistol events, while the .32 caliber variant was used in the 25 m Center-Fire Pistol event.