Glock OEM Gen 3 MOS Spare Slide

Upgrade your pistol with the Glock OEM Gen 3 MOS Spare Slide — a factory optic-ready solution that combines proven Gen-3 reliability with modern red-dot capability. Engineered by Glock, this slide offers dependable performance and streamlined customization for shooters who want enhanced target acquisition without sacrificing OEM quality.

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

Glock machines this spare slide from high-strength steel and applies a durable finish for resistance to wear and corrosion. Designed with the MOS (Modular Optic System) cut, the slide allows easy mounting of popular micro red-dot optics using adapter plates. It maintains Glock’s trusted internal geometry, ensuring smooth cycling and consistent performance across a wide range of conditions.

What’s Included For Complete OEM Slide

• Glock Gen 3 MOS spare slide (fully assembled)
• Glock factory barrel (model-specific)
• Recoil spring assembly (RSA)
• Extractor
• Firing pin assembly & firing pin safety
• Depressor plunger assembly
• Rear slide plate (Gen 3 style)
• Channel liner
• Factory front & rear sights
• MOS adapter plate set and mounting screws

What’s Included For Stripped OEM Slide

• Glock Gen 3 MOS stripped slide
• Channel liner
• Factory front & rear sights
• MOS adapter plate set and screws

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

Specifications

• Model: Glock OEM Gen 3 MOS Spare Slide
• Material: Hardened steel
• Finish: Durable black finish (model dependent)
• Slide Length: Model-specific (full-size/compact varies)
• Slide Width: Approx. 1.00 in (25.5 mm)
• Weight (stripped): Varies by model and production batch
• Caliber: Model-dependent (commonly 9mm)
• Optic Ready: Yes — MOS configuration (adapter plates included)
• Serrations: Rear (standard); some variants may include front serrations

How to Disassemble a Glock Gen 3 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. Mount your optic using the correct MOS adapter plate and screws, then perform a full function check.

Compatibility

This slide is designed for Glock Gen 3 frames and compatible components. It is not intended for Gen-4 or Gen-5 frames without modification. Always use Gen-3 specific barrels and internals for reliable operation.

Materials & Finish

Constructed from hardened steel, this OEM slide features a durable finish that resists corrosion and wear. It is built to withstand consistent use while maintaining Glock’s signature reliability and low-profile appearance.

Customization Options

• Optics: Compatible with Trijicon, Holosun, Shield, and other MOS-supported optics using included plates
• Sights: Upgrade to night sights, suppressor-height, or fiber-optic options
• Finish: Optional Cerakote or refinishing for custom colors (may affect warranty)
• Milling/Engraving: Additional work should be performed by a qualified gunsmith

FAQs

Q: Does the complete slide include MOS adapter plates?
A: Yes — OEM MOS slides typically include adapter plates and mounting screws.

Q: Can I mount any micro red-dot optic?
A: The MOS system supports many popular footprints. Always verify compatibility and screw length.

Q: Is this slide compatible with newer generations?
A: No. This slide is designed specifically for Gen-3 frames.

Q: Does mounting an optic affect warranty?
A: Using the MOS system as intended does not affect function, but unauthorized modifications may impact warranty.

Q: Does the stripped slide include sights?
A: Yes — most stripped slides include factory front and rear sights and the channel liner.

DISCLAIMER:

GlockSlides.us offers aftermarket and compatible slides and components for GLOCK pistols. We operate independently and are not affiliated with Glock, Inc. “GLOCK” is a registered trademark used for compatibility reference only.