The Zaf Upper Parts Kit (UPK) is specifically designed for Glock 17 Generation 5 pistols providing all essential components for completing your custom slide build.Upper Parts Kit for Glock 17 Gen 5US manufacturer with highest tolerance standardsMade to original Glock specificationsGen 5 specific design - not compatible with other generationsComplete kit for custom slide assemblyPerfect for gunsmiths and enthusiasts building custom Glock 17 Gen 5 slides this kit ensures reliable performance with precision-manufactured components that meet original equipment standards.