Gen 3 Glock 17/22 Slide Completion Parts Kit. INCLUDES: Spring cups, Extractor Depressor Plunger Bearing, channel liner, striker spacer sleeve, Extractor Depressor Plunger Spring, Striker Safety Spring, striker spring, backplate, 4140 Striker Safety, 4140 Extractor Depressor Plugner, 17-4 MIM Stainless Striker, 17-4 MIMStainless Extractor, recoil assembly, channel liner tool.