ZEV Technologies Competition Spring Kit, Includes Trigger, Firing Pin, and Safety/Spring ZT-SPR-KIT

ZEV Technologies Starter Spring Kit SPR-START-KIT

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ZEV Technologies Pin Kit, Trigger Pin, Locing Block Pin, Ejector Housing, Fits Glock Gen 4, Titanium ZT-PIN-KIT-G4

Zaffiri Precision UPK, Upper Parts Kit, For Glock 17/34 Gen 1-3, Includes Firing Pin and Spring, Firing Pin Spacer Sleeve, Firing Pin Channel Liner, Spring Cups, Safety Plunger and Spring, Extractor,

Zaffiri Precision UPK, Upper Parts Kit, For Glock 19 Gen 4, Includes Firing Pin and Spring, Firing Pin Spacer Sleeve, Firing Pin Channel Liner, Spring Cups, Safety Plunger and Spring, Extractor, Extra

Zaffiri Precision UPK, Upper Parts Kit, For Glock 17/34 Gen 4, Includes Firing Pin and Spring, Firing Pin Spacer Sleeve, Firing Pin Channel Liner, Spring Cups, Safety Plunger and Spring, Extractor, Ex