Glock 45

Glock 45 vs. Glock 19X: Same Build, Different Finish

The Glock 45 and Glock 19X use the same frame and slide combination. The G45 comes in black, while the 19X comes in coyote tan. Glock lists the 19X with night sights and a flared magwell. The G45 has standard sights and is offered with an optics cut in the MOS version. If you plan to add a red dot, the G45 MOS is the usual starting point. If you want the tan finish and factory night sights, see the Glock 19X.

Glock 45 MOS: Optics-Ready Configuration

The G45 MOS has a factory-milled slide that accepts Glock MOS adapter plates. Glock supplies plates for several popular red dot footprints, so you can mount a sight without aftermarket milling. Check your optic's footprint against the plate list before you buy. The MOS version suits USPSA Carry Optics shooters, home-defense setups, and anyone who wants a red dot on a duty-size pistol. Browse red dot sights once you know your footprint.

Front Slide Serrations and Gen 5 Features

The G45 has Gen 5 features that include the Marksman barrel, an ambidextrous slide stop, and no finger grooves on the grip. It also has front slide serrations, which make press-checks easier when an optic sits in the way of rear serrations. Front serrations are a small feature, but many shooters who press-check often prefer them. They are the main handling difference from a standard Glock 17 or Glock 19.

Using the Glock 45 for Competition

The G45 MOS is a common platform for USPSA Carry Optics. The full-size grip helps with recoil control and magazine capacity, while the shorter slide can feel quicker moving between targets. Many shooters add a quality red dot, an aftermarket trigger, and magazine extensions to reach a competition setup. Check your division's equipment rules before changing parts. A standard Glock 45 also works for Production-style shooting.

Glock 45 for Duty and Home Defense

For home defense, a full-size grip and 17-round magazine are the Glock 45's main advantages over a Glock 19. Many trainers suggest a full-size pistol where concealment is not the priority, because the larger grip and longer sight radius help shooting under stress. A weapon light on the rail and a red dot on the MOS version make a complete setup. Practice with your chosen defensive ammunition before relying on it.

Frequently Asked Questions: Glock 45

Is the Glock 45 a .45 caliber pistol?
No. The Glock 45 is chambered in 9mm. The "45" is Glock's model number, not the caliber. For .45 ACP, look at the Glock 21 or Glock 30.

What is the Glock 45?
It is a crossover 9mm pistol: a full-size Glock 17 frame with a Glock 19 slide and barrel length. Capacity is 17+1.

What is the difference between the Glock 45 and Glock 19X?
Both use the same frame and slide. The G45 is black and offered with a MOS optics cut. The 19X is coyote tan and, per Glock, comes with night sights and a flared magwell.

Does the Glock 45 come optics-ready?
The Glock 45 MOS has a factory-milled slide for a red dot using Glock MOS adapter plates. The standard Glock 45 does not. Confirm the version on the product listing.

What ammo does the Glock 45 use?
9mm Luger. See our 9mm ammo page for loads.

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