Zaffiri Precision Upper Parts Kit for Glock Gen 1-3

Zaffiri Precision Upper Parts Kit for Glock^® Gen 1-3

The Zaffiri Precision Upper Parts Kit (UPK) for Glock^® Gen 1–3 is the perfect solution for completing your custom G19 slide or replacing worn internal components. All parts are 100% American-made by a trusted U.S. manufacturer and machined to precise tolerances for optimal compatibility with OEM specifications. Whether you’re building from the ground up or performing a top-end rebuild, this comprehensive kit ensures smooth, reliable operation with premium quality parts.

Designed specifically for Glock^® 19 Gen 1, Gen 2, and Gen 3 models, this kit includes every essential internal component needed to complete your slide assembly — including the recoil spring assembly, which is not commonly included in many other kits. With premium-grade materials and attention to detail, each part is built for durability, fit, and function under hard use.

Parts Included:

• Firing Pin Spring
• Firing Pin Spacer Sleeve
• Spring Cups (2-Pieces)
• Firing Pin Safety
• Firing Pin Safety Spring
• Extractor Depressor Plunger
• Extractor Depressor Plunger Spring
• Spring Loaded Bearing
• Firing Pin Channel Liner
• Extractor
• Slide Cover Plate
• Recoil Spring Assembly

Compatibility:

• Glock^® 19 – Gen 1, Gen 2, Gen 3
• Also compatible with Gen 3 slide builds for Polymer80 PF940C frames

Installation Notice:

This product should be installed by a qualified gunsmith or experienced builder. Improper installation may result in malfunction or injury. No liability is expressed or implied for damage or harm resulting from the installation or use of this product.

If you are building or upgrading your Glock^® and have any questions about the Zaffiri Precision Upper Parts Kit for Glock^® Gen 1-3, we are always here to help!