NBS GLOCK 19 Upper Parts Kit Includes all the necessary Gen 3 parts for a functional GLOCK Upper Assembly (without slide, sights, or barrel). Parts are brand new and machined to precise specifications. Hard-to-find replacement parts in one handy kit! Perfect for a GLOCK Armorer’s kit! Features Complete frame upper parts kit for the Gen 1-3 GLOCK (does not include slide or barrel) Compatible with Polymer80 Frames Includes: Recoil Spring Channel Liner Extractor Firing Pin Spring Slide Cover Plate Extractor Depressor Plunger Spring Spring Loaded Bearing Firing Pin