Glock 45 MOS OEM Slide

Build or upgrade your Glock 45 with a factory-spec Glock 45 MOS OEM Slide, the optics-ready upper assembly that delivers trusted Glock handling, crossover ergonomics, and proven durability. This slide accepts every proper Gen 5 component, whether you’re completing a new build or upgrading to a red dot-ready setup.

Product Description | Specs for Glock 45 MOS OEM Slide

Machinists forge the Glock 45 MOS OEM Slide from steel and finish it to withstand everyday carry, recoil forces, and holster wear while keeping the compact-length slide profile that defines the Glock 45 crossover design. Built specifically for the Glock 45 platform, this slide carries the factory Modular Optic System (MOS) cut, letting you mount a compatible miniature red dot sight directly with the correct adapter plate.

The slide incorporates the correct rail geometry, breech face, and striker channel to mate with a Glock 45 full-size frame, compact-length barrel, and compatible upper parts kit without modification.

What’s Included For Complete OEM Slide

A complete OEM Glock 45 MOS slide assembly normally includes:

• Glock 45 MOS slide (machined with optic-ready cut and included cover plate)
• Glock Marksman barrel (9mm Luger, compact length for Glock 45)
• Glock upper parts kit, including:
  • Striker and striker spring
  • Spring-loaded bearing
  • Firing pin safety and spring
  • Extractor and extractor depressor plunger assembly
  • Slide cover plate
  • Rear sight and front sight (factory polymer or steel, model dependent)
  • Recoil spring assembly (dual spring, Gen 5 spec)

What’s Included For Stripped OEM Slide (No UPK)

A stripped OEM slide gives you the bare machined slide only:

• Glock 45 MOS slide only (optic cut, no cover plate installed)
• Machined and ready for upper parts kit installation

Stripped slides exclude internal parts, barrel, sights, and recoil spring components.

Specifications

• Model: Glock 45 MOS OEM Slide (compact-length slide, full-size frame crossover pattern)
• Material: Forged steel
• Finish: nDLC (nitrocarburized) black finish
• Compatible Caliber: 9mm Luger
• Slide Size: Compact-length
• Platform: Glock Gen 5 crossover (45 family)
• Optic Compatibility: Factory MOS cut, accepts direct-mount compatible optics with the correct adapter plate

How to Install a Glock 45 MOS OEM Slide

Install the Upper Parts Kit (UPK)

• Confirm all components are unloaded and clear.
• Install the striker assembly, firing pin safety, and spring.
• Install the extractor and extractor depressor plunger assembly.
• Insert the barrel and seat the dual recoil spring assembly.
• Install the slide cover plate and sights per OEM schematic.
• Function-check the striker and extractor for smooth operation.

Attach the Slide to the Frame

• Place the complete slide onto the frame rails.
• Pull the slide fully rearward and release to lock it into place.
• Rack the slide several times to confirm proper travel and alignment.
• Insert a magazine and perform a dry function check (with dummy rounds if available) before live fire.

(Refer to Glock’s official schematic for correct part orientation.)

How To Disassemble a Glock 45 MOS OEM Slide

1. Remove the slide from the frame and store it separately.
2. Remove the mounted optic (if installed) before storage or shipping.
3. Remove all magazines and store them separately.
4. Run a cable lock or trigger lock through the frame/magwell.
5. Store ammunition separately from the slide and frame.
6. Secure the slide in a locked container or gun safe.
7. For permanent disabling, contact a licensed gunsmith or FFL — don’t modify it yourself.

Compatibility

• Fits: Glock 45 frames (Gen 5 full-size frame with compact dust cover)
• Parts Compatibility: Use Gen 5 upper parts kits and compact-length Marksman barrels; verify optic footprint compatibility before you buy
• Optics: Accepts common MOS-footprint micro red dots with the correct mounting plate
• Magazines: Glock 17 and 19 9mm magazines fit a complete build on this slide/frame combo
• Gen Mix: The Glock 45 uses Gen 5 internals on a full-size frame with a compact slide — don’t mix Gen 5 slide parts with Gen 3 components, and verify fitment before mixing parts from other Glock models

What’s the Glock 45 MOS OEM Slide Made Of?

Machinists cut the Glock 45 MOS OEM Slide from forged carbon steel for strength and wear resistance, then finish it with a durable nDLC coating that resists corrosion and holster wear. They precision-machine the factory MOS cut to preserve slide integrity and hold a consistent optic zero.

Customization Options

• Slide Serrations: Factory forward and rear serrations aid manipulation; upgrade further if you want more purchase
• Optic Plates: Add MOS mounting plates to run multiple optic footprints
• Sights: Install suppressor-height or night sights that co-witness with your optic

Note: Modifications may affect warranty or serviceability. Consult a qualified armorer.

FAQs

Q: Does this slide include internal parts?
Complete kits include internal components, barrel, and sights; stripped slides don’t. Always verify what’s included before you buy.

Q: Will this slide fit a standard (non-MOS) Glock 45 frame?
Yes. The MOS slide fits standard Glock 45 frames — the MOS cut only affects the top of the slide for optic mounting.

Q: What optics fit the MOS cut?
Most MOS-footprint red dots fit using the correct adapter plate — always confirm your specific optic’s footprint first.

Q: Will an aftermarket UPK affect performance?
Quality aftermarket kits function well, but OEM-spec parts typically deliver the most consistent reliability.