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Customer Reviews
Helpful Positive Review
Great parts at good prices by Duck the platypus, Verified Owner, May 25, 2025
The ZP Upper parts for my gen 4 fit great and work great
1/1 found this helpful
Most Recent Reviews
Recoil Spring Assembly Too Long by KS, Verified Owner, March 19, 2026
Everything fit fine except for the recoil spring assembly, I’m assuming they accidentally threw in a different model by accident since the packaging is marked by hand which Gen it is
Most Recent Reviews
zaffari glock upper parts kit by James Bumbleburg, Verified Owner, March 9, 2024
Everything i needed to complete the assembly of my slide. Would buy again and definitely recommend for others. I would also recommend buying a channel installation tool if you don't already have one.
Most Recent Reviews
Awesome !!!! by Harmoni, February 28, 2024
My G19 Gen 4 has never run smoother. Everything fit exactly as advertised. Will buy again
Most Recent Reviews
Complete package by Tony 2 bucks, Verified Owner, February 4, 2024
This upper kit came with everything needed and works flawlessly. Had no issues running this in a ZP slide.
Read All 5 Reviews
Gun Make:
Glock
Gun Model:
Glock 19 Gen 4
Model Generation:
4

Code: 4SC-PP1-GL19G4-19-4-UPK

MPN: 19.4.UPK

UPC: 658792280041

List: $99.99Save 10%
$89.99

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Product Info for Zaffiri Precision Glock 19 Gen 4 Upper Parts Kit

Upper Parts Kit (UPK) for Glock 19 Gen 4. 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.image

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 19 Gen 4 Upper Parts Kit:

Manufacturer: Zaffiri Precision
Fabric/Material: Metal/Plastic
Gun Make: Glock
Gun Model: Glock 19 Gen 4
Model Generation: 4

Package Contents:

  • Zaffiri Precision Glock 19 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

Zaffiri Precision Glock 19 Gen 4 Upper Parts Kit Orderable Models

List of Orderable Models

  • Zaffiri Precision Glock 19 Gen 4 Upper Parts Kit, Metal/Plastic, 19.4.UPK , MPN: 19.4.UPK , UPC: 658792280041 , Code: 4SC-PP1-GL19G4-19-4-UPK
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