Description

Glock 45 MOS OEM Slide

The Glock 45 MOS OEM Slide is a factory-original component built specifically for the Glock 45 MOS platform. Because Glock machines this slide to original specifications, it delivers consistent fit, smooth cycling, and reliable optic mounting on the 9mm crossover pistol.

Moreover, this factory Glock 45 MOS slide combines the compact slide profile with the Modular Optic System and the Gen 5 feature set. As a result, this slide suits shooters who want a red dot ready crossover upper for duty carry, everyday carry, and range use.

What Makes This an OEM Glock Slide

An OEM Glock slide comes directly from Glock’s original manufacturing process. Glock machines each slide from high-quality steel and applies strict factory standards at every stage.

Therefore, the slide installs cleanly on a compatible Gen 5 frame and cycles as Glock intended. In contrast, many aftermarket slides focus on cosmetic changes rather than mechanical consistency.

What Sets the Glock 45 MOS Slide Apart

The 45 MOS is Glock’s 9mm crossover with a factory optic cut, so its slide has several distinctive traits.

• Factory MOS optic cut for mounting a compatible red dot without milling a new slide
• Compact slide length paired with a full size frame for balance and control
• Chambered in 9mm, not .45 caliber, despite the model number
• Front and rear serrations, cut for the GLOCK Marksman Barrel, finished in nDLC

Available Configurations

This slide is available in two configurations to support different build goals.

• Complete configuration: Installs immediately with factory internals
• Stripped configuration: Supports controlled or custom builds

As a result, buyers can choose convenience or flexibility while keeping OEM quality intact.

What’s Included For Glock 45 MOS OEM

Complete Slide Components

• OEM MOS slide body (optic cut, front and rear serrations)
• OEM GLOCK Marksman Barrel (9mm, 4.02 in)
• Recoil spring assembly (Gen 5 dual spring, compact length)
• Firing pin (striker) assembly
• Firing pin safety
• Extractor
• Depressor plunger assembly
• Rear slide plate
• Channel liner
• MOS adapter plate set
• MOS cover plate
• OEM Glock sights

Stripped Slide Components

• OEM MOS slide body (optic cut, front and rear serrations)
• Channel liner
• MOS cover plate
• OEM Glock sights

Note: The stripped option excludes the barrel, recoil spring assembly, and upper internal parts.

Specifications

Compatibility & Fitment

This slide fits Glock 45 Gen 5 frames. Glock designed the slide around the Gen 5 full size frame, the Gen 5 dual recoil spring system, and factory rail geometry.

The 45 uses a compact length slide on a full size frame, so this MOS slide shares its compact profile with the Gen 5 Glock 19 MOS length slide. However, it does not fit Gen 3 or Gen 4 frames, which use a different recoil setup. For optics, use a red dot that matches the MOS adapter plate footprint. Therefore, buyers should confirm model, generation, slide length, and optic footprint before ordering.

The complete slide installs as a true drop-in replacement when paired with a compatible Glock 45 Gen 5 frame. No fitting or modification is required.

Meanwhile, the stripped version accepts standard Glock Gen 5 compact length 9mm upper internals using common armorer tools. To mount an optic, select the correct MOS adapter plate, then torque the optic to specification. After assembly, perform a full function check before live fire.

Finish & Durability

Glock applies the nDLC surface finish to this slide to increase surface hardness and reduce friction during cycling. Additionally, the coating resists corrosion, scratches, and wear.

As a result, the slide performs reliably under extended duty and range use.

Customization Options For Glock 45 MOS OEM

Although Glock builds this slide to factory specifications, users can still apply several common upgrades.

• Mount a compatible micro red dot using the MOS adapter plate system
• Install suppressor height or co-witness night sights
• Apply Cerakote or custom coatings
• Request professional slide cuts or serrations

However, permanent modifications may affect factory warranty coverage.

Frequently Asked Questions

Is the Glock 45 a .45 caliber pistol? No. Despite the name, the Glock 45 is chambered in 9mm. It is a crossover pistol, not a .45 ACP model.

What does MOS mean on the Glock 45? MOS stands for Modular Optic System. The slide has a factory optic cut, so you can mount a compatible red dot using an adapter plate instead of milling a new slide.

Will this slide fit a Gen 3 or Gen 4 Glock? No. Glock engineered this slide for Gen 5 frames, which use a different recoil and frame setup.

Is the Glock 45 MOS slide the same as a Glock 19 MOS slide? The 45 uses a compact length slide that shares its profile with the Gen 5 Glock 19 MOS length slide. Confirm the exact model and generation before ordering.

How often should shooters replace the recoil spring? Most shooters replace it every 3,000 to 5,000 rounds.

Important Notice

This product is an OEM-compatible Glock component. We operate independently and do not affiliate with Glock, Inc. or Glock Ges.m.b.H. “GLOCK” is a registered trademark used only to identify compatibility.