Zaffiri Precision UPK-G19G4 Complete Upper Parts Kit - Fits Glock 19 Gen 4

The Zaffiri Precision UPK-G19G4 is a complete upper parts kit built to finish out a custom Glock 19 Gen 4 slide assembly chambered in 9mm Luger. Designed for pistol builders completing an aftermarket slide, replacing lost or worn factory components, or refreshing an existing build, this kit consolidates the small upper-related slide parts for the Gen 4 pattern into a single convenient package.

As part of Zaffiri Precision's UPK line, the kit is assembled from components sourced from US manufacturers and finished in black for a clean, factory-style appearance on a completed slide. The UPK-G19G4 is intended as a direct-fit replacement set for the factory small parts of a Glock 19 Gen 4 upper and installs without modification, making it a straightforward solution for completing a custom 9mm Glock slide build.