The Zaffiri Precision Upper Parts Kit (brand part no. UPK-G4348) supplies the small components needed to complete a custom Glock 43X or 48 slide build. Zaffiri Precision manufactures every part in the kit domestically and machines each piece to the same tolerances as the original factory specification, so builders get a drop-in fit without hand-fitting parts. Among Glock slides, this upper parts kit is built for owners assembling or finishing a custom slide on the 43X/48 platform who want factory-spec reliability from every internal component.

Key Specifications

• It fits the Glock 43X and 48.
• All parts are manufactured in the USA.
• Every component is machined to original factory specification tolerances.
• It is sold as a complete upper parts kit for finishing a custom slide.

Frequently Asked Questions

What is this kit for? It supplies the internal upper parts needed to complete a custom Glock 43X/48 slide build.

Are these OEM parts? No, they’re US-manufactured aftermarket parts machined to the same tolerances as the original factory specification.

Buy the Zaffiri Precision Upper Parts Kit

Factory-tolerance components for finishing your Glock 43X/48 slide build are exactly what this kit delivers. Order it from our Lubbock, Texas gun shop and it ships fast to your door.