Zaffiri Precision UPK, Upper Parts Kit, Does not Include Guide Rod, For Glock 17/19/26/34 Gen 1-4, 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 Recoil Cover Plate UPK