Glock 43X MOS OEM Slide (Complete)

Product Overview

The Glock 43X MOS OEM Complete Slide is a factory-assembled, optics-ready slide built to Glock’s precise standards. It ships complete with a factory barrel, recoil spring assembly, and all internal components. Designed for drop-in compatibility, it’s ideal for direct replacements, repairs, or turnkey upgrades. Mount your preferred optic, attach to a Glock 43X MOS-compatible frame, and you’re range-ready.

Product Description | Specs

Key Details

• Condition: Complete OEM slide assembly (includes barrel, recoil spring assembly, and internal components)
• Fitment: Glock 43X MOS (verify part number and frame compatibility)
• Material: Hardened, high-strength steel (factory-grade)
• Finish: Factory nDLC (nitride) corrosion-resistant finish
• Serrations: Factory front and rear machined serrations for confident handling
• Optics Cut: MOS (Modular Optic System) cut – accepts Glock MOS optic plates
• Sights: Factory-installed dovetail sights included (can be swapped for optic plates)
• Weight: OEM slide assembly weight (varies slightly with optic or finish)
• Tolerance: Machined and assembled to Glock factory specifications for reliable lockup and consistent cycling

Technical Specs 

• Model: Glock 43X MOS OEM Complete Slide Assembly
• Material: Hardened steel slide with OEM-grade barrel steel
• Finish: Factory nDLC / nitride finish
• Includes:
• Slide
• Barrel
• Recoil spring/guide assembly (RSA)
• Extractor
• Firing pin assembly
• Firing pin safety
• Depressor plunger assembly
• Rear slide plate
• Channel liner (where applicable)
• Factory sights (MOS configuration)
• Fit: Glock 43X MOS-compatible frames
• Factory Assembled & Tested: Yes

What’s Included for Complete MOS OEM Slide

In the Box

• 1 × Glock 43X MOS OEM Complete Slide Assembly (slide + barrel + RSA + internals + factory sights)

Not Included

• Frame (receiver)
• Magazine(s) (sold separately)
• Optic plates or red-dot sight (sold separately)
• Aftermarket sights or accessories (unless ordered as a bundle)

How to Install the Glock 43X MOS OEM Complete Slide

Safety First

• Always work on a clean, well-lit surface.
• Wear eye protection.
• Confirm the firearm is unloaded and pointed in a safe direction.
• Follow Glock’s official instructions or consult a qualified gunsmith.

Drop-In Installation (Overview)

1. Confirm the slide matches your Glock 43X MOS frame.
2. Remove the magazine and verify the chamber is empty.
3. Align the slide on the frame rails and gently rack it into place.
4. Perform a basic function check:

• Rack the slide
• Test slide lock
• Dry-fire (where legal)
• Verify proper reset and slide movement

1. Mount your optic if applicable, following the optic manufacturer’s torque and installation guidelines.
2. Always perform a live-fire test at a safe range before relying on the firearm for duty or carry.

How to Disassemble the Glock 43X MOS OEM Slide (Maintenance & Service)

Routine Disassembly (Overview)

1. Remove magazine and lock the slide open; confirm the chamber is empty.
2. Follow Glock takedown steps to separate the slide from the frame.
3. Remove the recoil spring assembly and barrel for cleaning.
4. Inspect internal components such as extractor, firing pin channel, and safety plunger.
5. Clean, lubricate, and reassemble in reverse order.
6. For deeper disassembly or part replacement, consult a qualified armorer or gunsmith.

What the Glock 43X MOS OEM Slide Is Made Of

Glock builds the 43X MOS slide from hardened, high-strength steel, engineered to handle thousands of rounds under demanding conditions. The factory nDLC (nitride) finish resists wear, corrosion, and glare, ensuring long-term reliability. Every component meets Glock’s OEM quality standards for durability and consistency.

Customizations & Upgrades

Popular Options

• Optic Mounting: Install red-dot optics using the Glock MOS plate system.
• Sights: Upgrade to night sights or fiber-optic dovetail replacements.
• Finishes: Apply Cerakote or custom coatings for color or enhanced corrosion resistance.
• Professional Milling: Add ports or cosmetic cuts — only through certified gunsmiths.

Note: Permanent slide modifications can affect factory warranty and safety. Always use a qualified professional for advanced work.

FAQs

Q: Is this slide ready to fire out of the box?

 The slide comes fully assembled with barrel and internals but requires a Glock 43X MOS-compatible frame and magazine to function.

Q: Is it optic-ready?

Yes. The Glock 43X MOS slide features the Modular Optic System cut for easy optic mounting. Optic plates and red-dots are sold separately.

Q: Can I use it on a standard Glock 43X frame?

It will fit most Glock 43X frames, but to use optics properly, a MOS frame is recommended. Always confirm compatibility before purchase.

Q: Does it include sights?

 Yes. It ships with factory-installed dovetail sights. You can replace them with night sights or remove them when mounting an optic.

Q: Do I need a gunsmith for installation?

 Most users can install it as a drop-in replacement following Glock’s instructions. For optic mounting or sight zeroing, consult a professional.

Q: Is the MOS finish durable?

 Absolutely. The nDLC (nitride) finish enhances hardness, reduces friction, and provides superior corrosion resistance.

DISCLAIMER

Oemglockslides.com 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.