GLOCK practice pistols are functional in terms of loading, unloading, "Safe Action" trigger operation, manual manipulation of the slide and field stripping/disassembly. Live ammunition fire is prevented by safety features, such as serially matched plugged barrels, deactivated firing pin and solid breech-face with no firing pin hole. The chamber located safety valve equally serves as a loaded chamber indicator. GLOCK practice pistols are an invaluable tool to practice the manual of arms for GLOCK pistols, for demonstration purposes, and for dryfiring techniques, even in non-range environments. The plugged barrel is lightened by horizontal bores to preserve the same balance as live pistols.