Zaffiri Precision Upper Parts Kit for Glock 17

The Zaffiri Precision Upper Parts Kit for Glock 17 includes firing pin spring, firing pin spacer sleeve, spring cups (2-pack), firing pin safety, firing pin safety spring, extractor depressor plunger, extractor depressor plunger spring, spring-loaded bearing, firing pin channel liner, extractor, recoil spring assembly (guide rod), and slide cover plate.

Note: The Gen 1-3 parts kit includes a polymer recoil spring assembly (guide rod). The Gen 4 and 5 kits feature a stainless steel recoil spring assembly (guide rod) that’s OEM spring weight.