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