Rival Arms Glock Slide Completion Kit, For Glock 9MM Gen3/Gen4, Black Finish, Kit Includes Striker (Firing Pin) Spring, Extractor, Striker (Firing Pin) Safety Spring, Back Cover Plate, Extractor Depressor Plunger, RA Precision Striker (Firing Pin), Striker (Firing Pin) Spacer Sleeve, Depressor Plunger Spring, Striker (Firing Pin) Safety, Spring Loaded Bearing, Striker (Firing Pin) Spring Cups and Slide Channel Liner RA-RA42G001A High quality components and precise manufacturing make Rival Arms parts ideal for maintaining and upgrading firearms. The durability" reliability and excellent build quality of these parts will ensure years of service you can count on.