Zaffiri Precision Glock 17/34/17L Gen 4 Upper Parts Kit Metal/Plastic. These are great for completing your custom slide. All parts are from US manufacturer. All Parts are made to the highest tolerance to the original specification. Warning: This product is to be installed by a competent gunsmith. No liability is expressed or implied for damage or injury which may result from installation or use of this product. DISCLAIMER: This product is not manufactured authorized endorsed or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols. Specifications for Zaffiri Precision Glock 17/34/17L Gen 4 Upper Parts Kit: Manufacturer: Zaffiri Precision Fabric/Material: Metal/Plastic Gun Make: Glock Gun Model: Glock 34 Glock 17L Glock 17 Model Generation: 4 Condition: New Package Contents: Zaffiri Precision Glock 17/34/17L Gen 4 Upper Parts Kit 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 Aluminum Recoil Sring Assembly What firearm models does the manufacturer say Zaffiri Precision Glock 17/34/17L Gen 4 Upper Parts Kit is compatible with? The manufacturer suggests that Zaffiri Precision Glock 17/34/17L Gen 4 Upper Parts Kit is compatible with Glock 17 Glock 17L Glock 34Zaffiri Precision 17.34.4.UPK: Glock 17/34/17L Gen 4 Upper Parts Kit Metal/Plastic