Glock 19 Gen 4 MOS OEM Slide

Upgrade your Glock 19 with the Glock 19 Gen 4 MOS OEM Slide — a factory optic-ready slide built for versatility, reliability, and modern performance. Glock engineered this slide to support red dot optics while maintaining the trusted Gen 4 platform. Its MOS cut allows quick and secure mounting of popular micro red-dot sights for faster target acquisition.

Product Description | Specs for Glock 19 Gen 4 MOS OEM Slide

Glock machines this slide from high-strength steel and applies a durable, corrosion-resistant finish for long-lasting use. The slide features the Modular Optic System (MOS), allowing you to mount optics using included adapter plates without custom machining. Rear serrations provide a secure grip for smooth slide manipulation, while the Gen 4 design supports the dual recoil spring system for improved durability and recoil control.

What’s Included For Complete OEM Slide

• Glock 19 Gen 4 MOS slide (fully assembled)
• OEM 9mm barrel
• Dual recoil spring assembly (RSA)
• Extractor
• Firing pin assembly & firing pin safety
• Depressor plunger assembly
• Rear slide plate
• Channel liner
• Factory front & rear sights
• MOS adapter plate set and mounting screws

What’s Included For Stripped OEM Slide

• Glock 19 Gen 4 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 19 Gen 4 MOS OEM Slide
• Material: Hardened steel
• Finish: Corrosion-resistant black finish
• Slide Length: 7.28 inches (185 mm)
• Slide Width: Approx. 1.00 in (25.5 mm)
• Weight (stripped): Approx. 6.0–6.5 oz
• Caliber: 9mm Luger
• Optic Ready: Yes — MOS configuration (adapter plates included)
• Serrations: Rear (factory)

How to Disassemble a Glock 19 Gen 4 MOS 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 remove it from 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. 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 to lock into place.
5. Mount your optic using the correct MOS adapter plate and screws, then perform a full function check.

Compatibility

This slide fits Glock 19 Gen 4 frames and Gen 4-compatible parts. It does not fit Gen 3 or Gen 5 frames due to differences in recoil systems and internal design.

Materials & Finish

Glock crafts the slide from hardened steel and applies a protective finish that resists corrosion and wear. This ensures reliable performance and long service life under various conditions.

Customization Options

• Optics: Mount Trijicon, Holosun, Leupold, and other MOS-compatible red dot sights using included plates.
• Sights: Upgrade to suppressor-height, night, or fiber-optic sights for co-witnessing.
• Finish: Apply Cerakote or custom coatings for a personalized look.
• Engraving: Add custom engravings or slide work for a unique appearance.

FAQs

Q: Does the complete slide include MOS adapter plates?
A: Yes — the complete slide includes MOS adapter plates and mounting hardware.

Q: Can I mount any red dot optic?
A: The MOS system supports most popular footprints using adapter plates. Always verify compatibility.

Q: Is this slide compatible with Gen 3 or Gen 5 frames?
A: No, it is specifically designed for Gen 4 frames.

Q: What advantage does the MOS system offer?
A: It allows easy optic mounting without custom milling.

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