Product Description The Zaffiri Precision Upper Parts Kit (17.5.UPK) is a complete Gen 5 slide upper parts set designed to help finish or refresh a Glock 17/34 Gen 5 slide with reliable, factory-spec fit and function. This kit consolidates essential striker, extractor, and safety components along with an upgraded ZP stainless steel recoil spring assembly (guide rod) using OEM spring weight. Select components feature a durable nitride finish for enhanced wear resistance in high round-count use. Product Highlights Complete upper parts kit for Glock 17/34 Gen 5 slide assemblies (Gen 5-specific components). Includes upgraded Zaffiri Precision stainless steel recoil spring assembly (guide rod) with OEM spring weight. Nitride-finished components included (firing pin safety and extractor depressor plunger) for added durability. Ideal for custom slide builds, replacements, and maintenance to restore consistent cycling and extraction. All-in-one package includes key striker, extractor, safety, and cover plate components. Specs Brand: ZAFFIRI PRECISION Manufacturer Part Number: 17.5.UPK UPC: 658792280874 Compatibility: Glock 17/34 Gen 5 Included Parts: Firing pin spring; firing pin spacer sleeve; spring cups (2-pack); firing pin safety (nitride); firing pin safety spring; extractor depressor plunger (nitride); extractor depressor plunger spring; spring loaded bearing; firing pin channel liner; extractor; slide cover plate; ZP stainless steel recoil spring assembly (guide rod), OEM spring weight Approx. Package Dimensions: 4.3 in (L) x 3.7 in (W) x 0.9 in (H) Approx. Weight: 0.14 lb Country of Manufacture: United States Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.