Glock 31 Gen 4 Slide

Upgrade your Glock with the Glock 31 Gen 4 OEM Slide — a full-size, factory slide chambered in .357 SIG, built on the Gen 4 platform. Delivering flat-shooting, high-velocity performance, this slide retains Glock’s dependable Gen 4 internals in a proven duty-size configuration.

Product Description | Specs for Glock 31 Gen 4 OEM Slide

Glock machines this slide from high-strength steel and applies a durable finish for long-lasting wear and corrosion resistance. Built on the Gen 4 platform, it features Glock’s dual recoil spring assembly for improved recoil management with the high-pressure .357 SIG cartridge, along with the enlarged, reversible magazine catch and updated grip texture compatibility introduced in this generation.

What’s Included — Complete OEM Slide

• Glock 31 Gen 4 slide (fully assembled)
• Glock barrel (model-specific, .357 SIG)
• Dual recoil spring assembly (Gen 4 style)
• 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 — 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: Black (factory finish)
• Slide Length: Full-size (Glock 31 length)
• Slide Width: Approx. 1.00 in (25.5 mm)
• Caliber: .357 SIG
• Porting: No — standard (non-compensated) slide
• Optic Ready: No (non-MOS configuration)
• Serrations: Front & rear (Gen 4 standard 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 dual recoil spring assembly.
5. Lift the barrel out of the slide.

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

How to Install a Glock Slide

1. Insert the barrel into the slide.
2. Seat the dual 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 components. It is not directly compatible with Gen 3 or Gen 5 frames without modification. Use a standard Glock 31 barrel in .357 SIG for proper fit and function.

Materials & Finish

Constructed from hardened steel and finished with Glock’s durable coating, this slide is built to withstand extended use, including the higher pressures generated by the .357 SIG cartridge.

Customization Options

• Sights: Upgrade to night sights or fiber-optic options
• Finish: Apply Cerakote or custom coatings (may affect warranty)
• Barrel: Compatible with standard and aftermarket Glock 31 barrels
• Engraving: Professional engraving or customization available

FAQs

Q: Is this slide optic-ready? A: No — this is a standard Gen 4 slide without MOS capability.

Q: Will this slide fit my Gen 3 or Gen 5 Glock 31? A: No — Gen 4 slides are not directly compatible with Gen 3 or Gen 5 frames without modification.

Q: Can I use an aftermarket barrel with this slide? A: Yes — standard Glock 31 barrels in .357 SIG, factory or aftermarket, are compatible with this slide.

Q: Does the complete slide include a barrel? A: Yes — the complete version includes a factory Glock 31 barrel in .357 SIG.