# Glock 45 Gen4 9mm MOS Pistol: Precision Optic Ready, Matte Black

**Brand:** Glock
**Category:** Full Size Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 4.02"
- **Capacity:** 17 rounds
- **Finish:** Black
- **Weight:** 30.34 oz
- **UPC:** 764503039348
- **SKU:** UCDSUKqF2

## Description

The Glock 45 Gen4 in 9mm is a full-size frame built on a compact slide, the same combination Glock developed for law enforcement crossover duty. The MOS (Modular Optic System) cut on the slide lets you mount a red dot without a gunsmith.

### Key Specifications
- **Caliber:** 9mm Luger (9x19 Para)
- **Barrel Length:** 4.49 inches
- **Capacity:** 17 rounds
- **Weight:** 30.34 oz (2.5 lbs)
- **Frame Material:** Polymer
- **Finish Color:** Matte Black
- **Manufacturer:** Glock
- **Model Number:** PR45509MOS

### Detailed Features
- **Modular Optic System (MOS):** Machined slide cuts accept a range of red dot optics for faster target acquisition.
- **Glock Marksman Barrel (GMB):** The improved barrel geometry produces tighter, more consistent groups.
- **Safe Action System:** Three independent safeties (trigger, firing pin, drop), all disengage in the normal draw and fire sequence.
- **Grip Design:** Interchangeable backstraps and aggressive texture let you dial in the fit for your hand size.

## Frequently Asked Questions

**Q: What caliber is the Glock 45 M.O.S?**

A: The Glock 45 M.O.S is chambered in 9mm Luger.

**Q: Who makes the Glock 45 M.O.S?**

A: It is made by Glock.

**Q: What type of firearm is the Glock 45 M.O.S?**

A: It is a full-size handgun built on a polymer frame with a compact slide.

**Q: How many rounds does the Glock 45 M.O.S hold?**

A: It has a 17-round capacity.

**Q: Is the Glock 45 M.O.S optic-ready?**

A: Yes, the slide has a Modular Optic System cut that accepts a range of red dot optics.

**Q: Where can I buy the Glock 45 M.O.S?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

The Glock 45 Gen4 MOS draws consistent praise for reliability. Owners report running it through a wide variety of ammunition without significant issues, which is in line with the platform's general reputation. The MOS feature gets specific mention from shooters who run red dots; the mounting process is straightforward and the available adapter plates cover most popular optics.

Ergonomics come up often, positively. The full-size grip on a compact slide works well for a range of hand sizes, and the matte black finish holds up well to holster wear. The 17-round capacity is considered one of the better capacity-to-size ratios in the duty-size category.

The trigger gets mixed notes. It's smooth and consistent, but some shooters who come from striker-fired pistols with lighter or shorter resets find it less refined. Cosmetics are a minor point of debate. The utilitarian look is exactly what some buyers want and a non-starter for others who prefer more visual customization from the factory.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Classicfirearms Com | $499.99 |

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*Data from [GunsNation](https://gunsnation.com)*