Glock 31 Gen 4 OEM Slide

Upgrade your Glock with the Glock 31 Gen 4 OEM Slide — a factory-engineered slide built for durability, reliability, and consistent performance. Designed around the powerful .357 SIG platform, this Gen 4 slide delivers duty-ready strength with proven Glock simplicity and precision.

Product Description | Specs for Glock 31 Gen 4 OEM Slide

Glock machines this slide from high-strength steel and applies a durable factory finish for resistance against wear and corrosion. Built on Glock’s Gen 4 architecture, the slide maintains dependable cycling and compatibility with standard Glock internal components. Its robust construction supports the higher pressures of .357 SIG while ensuring smooth operation and long service life.

What’s Included For Complete OEM Slide

• Glock 31 Gen 4 slide (fully assembled)
• Factory barrel (model-specific, .357 SIG)
• Recoil spring assembly (RSA)
• Extractor
• Firing pin assembly & firing pin safety
• Depressor plunger assembly
• Rear slide plate (Gen 4 style)
• Channel liner
• Factory front & rear sights

What’s Included For Stripped OEM Slide

• Glock 31 Gen 4 stripped slide
• Channel liner
• Factory front & rear sights

Note: Stripped slides do not include barrel, RSA, or upper internal components.

Specifications

• Model: Glock 31 Gen 4 OEM Slide
• Material: Hardened steel
• Finish: Factory black finish (Gen 4 treatment)
• Slide Length: Glock 31 standard (full-size)
• Slide Width: Approx. 1.00 in (25.5 mm)
• Caliber: .357 SIG (with proper barrel)
• Optic Ready: No (non-MOS configuration)
• Serrations: Rear (standard Gen 4 pattern)

How to Disassemble a Glock 31 Gen 4 Slide

1. Ensure the firearm is unloaded and remove the magazine.
2. Pull the slide slightly rearward and depress both takedown levers.
3. Release the slide forward and lift it off the frame.
4. Remove the recoil spring assembly.
5. Lift the barrel out of the slide.

Now the slide is ready for cleaning, inspection, or service.

How to Install a Glock Slide

1. Insert the barrel into the slide.
2. Seat the recoil spring assembly against the barrel lug.
3. Align the slide on the frame rails.
4. Pull the slide fully rearward and release to lock it in place.
5. Perform a full function check before use.

Compatibility

This slide fits Glock 31 Gen 4 frames and Gen-4 compatible parts. It is not designed for Gen-3 or Gen-5 frames without modification. Always use model-specific components for proper fit and function.

Materials & Finish

Glock manufactures the Glock 31 Gen 4 OEM Slide from hardened steel and applies a corrosion-resistant black finish. This treatment enhances durability, reduces surface wear, and maintains a low-glare appearance suitable for duty or range use.

Customization Options

• Sights: Upgrade to night sights, fiber-optic, or suppressor-height options
• Finish: Apply Cerakote or custom coatings (may affect warranty)
• Barrel: Swap with aftermarket or conversion barrels (e.g., .40 S&W)
• Engraving/Milling: Work with a qualified gunsmith for custom work

FAQs

Q: Is this slide optic-ready?
A: No — this is a standard (non-MOS) Gen 4 slide without factory optic cuts.

Q: Can I convert calibers with this slide?
A: Yes — many users run .40 S&W conversion barrels, but always verify compatibility.

Q: Is it compatible with Gen-5 frames?
A: No. Glock designed Gen-4 slides specifically for Gen-4 frames.

Q: Does the stripped slide include internals?
A: No — stripped versions include only the slide body, channel liner, and sights.

DISCLAIMER

GlockSlides.us offers aftermarket and compatible slides and components for GLOCK pistols. We operate independently and do not represent, endorse, or have any connection with GLOCK, Inc. or GLOCK Ges.m.b.H. “GLOCK” is a federally registered trademark of GLOCK, Inc. and used here only to identify compatible parts.