Glock 17/34 Gen 5 Upper Parts Slide Completion Kit UPK

Zaffiri Precision

$99.99

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Glock 17 / 34 Gen 5 – Upper Parts Kit – Slide Completion Kit – UPK

PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.

Made by Zaffiri Precision, this Upper Parts Kit (UPK) is a complete slide-completion bundle for Glock 17/34 Gen 5 builds—meant to bring a stripped Gen 5 slide to life with the critical internal components you don’t want to piece together one tiny part at a time. It’s built around Gen 5-specific parts and is intended for reliable ignition, extraction, and proper safety-plunger function when assembling a custom upper.

Fitment

  • Fits: Glock 17 Gen 5
  • Fits: Glock 34 Gen 5

Does NOT fit

  • Does not fit: Gen 1–4 Glock 17/34 slide builds
  • Not for other Glock models unless specifically listed as compatible

What it does

  • Completes a stripped Gen 5 slide with the upper internals required for operation.
  • Supports consistent striker function, safety plunger engagement, and extraction/ejection parts function.
  • Includes an upgraded stainless recoil spring assembly (guide rod) with OEM spring weight so your upper can cycle correctly.

Why it’s worth it

  • One-and-done kit: saves time and prevents missing “one stupid spring” mid-build.
  • Cleaner builds: keeps your slide parts consistent instead of mixing random leftover internals.
  • Smart spare: good to have if you run multiple slides or a high-round-count gun.

Specs

  • Platform: Glock 17 / 34 Gen 5
  • Kit type: Upper / slide parts kit
  • Recoil spring assembly (guide rod): Stainless, OEM spring weight
  • Gen-specific: Gen 5 only

What’s included

  • 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
  • Upgraded stainless recoil spring assembly (guide rod), OEM spring weight

Tools needed

  • Glock slide tool / armorer’s punch
  • Channel liner installation tool (recommended)
  • Bench block or steady work surface

Install notes

  • Unload and clear the firearm before any work.
  • Install carefully—small parts will launch into orbit if you rush it.
  • After assembly: perform a full function check, then test-fire before defensive use.

Verify before you buy

  • Confirm your slide/build is Glock 17 or 34 Gen 5.
  • Confirm you are not mixing Gen 1–4 parts with Gen 5 components.

⚠ Install & Compatibility Disclaimer: Firearm parts should be installed by a qualified armorer or gunsmith when in doubt. Improper installation, modification, or use of aftermarket components may affect firearm safety, reliability, and void manufacturer warranties. By purchasing and installing third-party parts, the buyer assumes all responsibility for safe handling, installation, function testing, and use of their firearm and accessories.

⚠ Glock Disclaimer

IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by Glock, Inc. or Glock Ges.m.b.H.
All references to GLOCK® are used solely to identify firearm models, parts compatibility, and fitment information for customers. Glock is a federally registered trademark of Glock, Inc. and Glock Ges.m.b.H.

Any product sold on this site referencing Glock is aftermarket, not OEM, and is not manufactured by Glock. Glock does not warranty, authorize, or guarantee the performance, safety, or reliability of any third-party components or modifications.

Firearm parts should be installed by a qualified armorer or gunsmith. Improper installation, modification, or use of aftermarket components may affect firearm safety, reliability, and void manufacturer warranties. By purchasing and installing third-party parts, the buyer assumes all responsibility for safe handling, installation, function testing, and use of their firearm and accessories.

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