Glock 31 Gen 4 OEM Slide

The Glock 31 Gen 4 OEM Slide is a factory-original slide built specifically for Glock 31 Gen 4 pistols chambered in .357 SIG. Because Glock machines this slide to original factory specifications, it delivers smooth cycling, strong lockup, and dependable OEM performance under high-pressure duty loads.

Moreover, this slide suits shooters who rely on the .357 SIG platform for duty, defense, or training. As a result, it works well for law-enforcement pistols, duty rebuilds, and factory-correct Glock 31 Gen 4 setups.

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What Makes This an OEM Glock Slide

An OEM Glock slide comes directly from Glock’s original manufacturing process. Glock machines each slide from high-strength steel and applies strict quality controls throughout production.

Therefore, the slide maintains Glock’s intended geometry, balance, and durability. In contrast, many aftermarket slides adjust tolerances or coatings, which can compromise reliability with .357 SIG pressures.

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Available Configurations

This slide is available in two configurations to support different build needs.

• Complete configuration: Installs immediately with factory internals

• Stripped configuration: Supports controlled or custom builds

As a result, buyers can choose fast installation or flexible assembly while preserving OEM quality.

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What’s Included

Complete Slide Components

• OEM slide body

• OEM barrel

• Recoil spring assembly

• Firing pin assembly

• Firing pin safety

• Extractor

• Depressor plunger assembly

• Rear slide plate

• Channel liner

• OEM Glock sights

Stripped Slide Components

• OEM slide body

• Channel liner

• OEM Glock sights

Note: The stripped option excludes the barrel, recoil spring assembly, and upper internal parts.

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Specifications

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Compatibility & Fitment

This slide fits only Glock 31 Gen 4 frames. Glock engineered the slide around Gen 4 internals, the dual recoil spring system, and the .357 SIG operating pressure.

However, it does not fit Gen 3 or Gen 5 frames, Glock 22 or Glock 17 frames, MOS configurations, or clone platforms such as the PSA Dagger. Therefore, buyers should confirm model and generation before ordering.

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Installation Expectations

The complete slide installs as a true drop-in replacement when paired with a compatible Gen 4 frame. No fitting or modification is required.

Meanwhile, the stripped version accepts standard Gen 4 Glock upper internals using common armorer tools. After assembly, perform a full function check before live fire.

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Finish & Durability

Glock applies its factory nDLC finish to protect this slide from wear and corrosion. Additionally, the coating reduces friction during cycling and supports consistent performance with high-velocity .357 SIG loads.

As a result, the slide maintains reliability during extended duty cycles and high-round-count training.

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Customization Options

Although Glock builds this slide to factory specifications, users can still apply select upgrades.

• Install duty-rated or night sights

• Apply Cerakote or custom finishes

• Add professional slide serrations or engraving

However, permanent modifications may affect factory warranty coverage.

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Frequently Asked Questions

Will this slide fit a Glock 31 Gen 3 frame?
No. Glock engineered this slide exclusively for Gen 4 frames.

Can users convert this slide to .40 S&W?
Yes, with a compatible Glock 22 Gen 4 barrel and magazines.

Can users add a red-dot optic to this slide?
No. This slide does not include an optic cut.

How often should shooters replace the recoil spring?
Most shooters replace it every 3,000 to 5,000 rounds.

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Important Notice

This product is an OEM-compatible Glock component. We operate independently and do not affiliate with Glock, Inc. or Glock Ges.m.b.H. “GLOCK” is a registered trademark used only to identify compatibility.