The Zaffiri Precision Upper Parts Kit (UPK) supplies the internal parts needed to complete a custom or stripped Glock 19 Gen 4 slide. It includes an upgraded stainless steel guide rod and is a convenient way to finish an aftermarket slide build in one order.
- Fits: Glock 19 Gen 4
- Includes: firing pin and spring, firing pin spacer sleeve, firing pin channel liner, spring cups, safety plunger and spring, extractor, extractor depressor plunger assembly, slide cover plate, upgraded stainless steel guide rod
- MPN: 19.4.UPK
