Glock OEM Gen 3 MOS Spare Slide

Upgrade or build your Glock with the Glock OEM Gen 3 MOS Spare Slide, a factory original slide engineered for shooters who want the flexibility of red dot optics on their Gen 3 frame. Featuring Glock’s Modular Optic System (MOS), this slide is ideal for those who demand precision, versatility, and factory-grade performance.

Product Description | Specs for Glock OEM Gen 3 MOS Spare Slide

Glock manufactures this slide from high-strength steel and coats it with a durable, corrosion-resistant finish for long-lasting performance. The factory-cut MOS configuration allows for direct mounting of optics using included adapter plates—no custom machining required. Front and rear serrations offer enhanced grip for slide manipulations, making it easier to operate in tactical, competition, or everyday scenarios.

What’s Included for Stripped OEM Slide

• Glock OEM Gen 3 MOS slide with front and rear serrations
• Factory MOS adapter plate set
• Fixed Glock sights (may vary by production batch)
• Channel liner (pre-installed)

Note: This is a stripped slide. It does not include the barrel, recoil spring assembly, or internal components.

Specifications

• Model: Glock OEM Gen 3 MOS Slide
• Material: Hardened steel
• Finish: Durable corrosion-resistant coating (Black nDLC or equivalent)
• Slide Length: Matches Gen 3 Glock 17 or 19 specifications (depending on model)
• Slide Width: 1.0 inch (25.5 mm)
• Caliber Compatibility: 9mm
• Optic Cut: Factory MOS configuration for multiple red dot sights
• Serrations: Front and rear for improved grip

How to Disassemble a Glock Gen 3 Slide

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

How to Reinstall a Glock Slide

1. Insert the barrel into the slide.
2. Place the recoil spring assembly onto the barrel lug.
3. Align the slide with the frame rails.
4. Pull the slide fully rearward and release it.
5. Perform a function check to confirm proper operation.

Compatibility

This OEM MOS spare slide is specifically designed for Glock Gen 3 frames (e.g., Glock 17 Gen 3). It is not compatible with Gen 4 or Gen 5 models due to different recoil spring and frame dimensions.

What Is the Glock OEM Gen 3 MOS Spare Slide Made Of?

The slide is machined from high-strength steel and finished with Glock’s corrosion-resistant coating. The nDLC or similar finish ensures reduced friction, enhanced durability, and minimal reflection, even in harsh environments.

Customization Options

• Optics: The MOS platform supports Trijicon RMR, Holosun, Leupold, and other red dot sights using included adapter plates.
• Sights: Replace factory iron sights with night sights or fiber optics.
• Finish: Customize with Cerakote, nitride, or PVD finishes for a unique look.
• Engraving: Add personalized laser engraving or slide cuts.

FAQs

Q: Does this slide come with internal components?
No, this is a stripped slide. It includes sights, a channel liner, and MOS plates but no barrel, recoil spring, or upper internals.

Q: Can I mount a red dot on this slide?
Yes, the factory MOS cut allows for direct mounting of optics using the adapter plates provided.

Q: Is this compatible with Gen 4 or Gen 5 Glock pistols?
No, it is only compatible with Gen 3 Glock frames due to internal design differences.

DISCLAIMER

GlockSlides.us provides 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, Inc. and GLOCK Ges.m.b.H own the trademark “GLOCK” and other related marks. We mention “GLOCK” only to identify parts and products that fit or work with GLOCK pistols.