Glock 40 Gen 4 Review

In-Depth Glock 40 Gen 4 Review: Pros and Cons

Welcome to our in-depth review of the Glock 40 Gen 4. In this article, we will explore the features, performance, and reliability of this powerful handgun. The Glock 40 Gen 4 is chambered in the formidable 10mm round, making it a force to be reckoned with in terms of velocity and power. With its 6-inch barrel, it can achieve velocities of 1300+ feet per second, making it an excellent choice for target and competition shooting.

One of the standout features of the Glock 40 Gen 4 is its manageable recoil, despite the potency of the 10mm round. It offers compatibility with a wide range of sights and optics, allowing shooters to customize their setup to their preferences. However, due to its size and long barrel length, it may not be the best option for concealed carry.

Now, let’s take a closer look at the design, ergonomics, shooting performance, maintenance, and parts of the Glock 40 Gen 4 to help you determine if it’s the right firearm for you.

Key Takeaways:

  • The Glock 40 Gen 4 is chambered in the powerful 10mm round, delivering impressive velocity and performance.
  • It features a 6-inch barrel and offers compatibility with various sights and optics.
  • The pistol’s recoil is manageable, and it is renowned for its reliability.
  • While it may not be suitable for concealed carry, it excels in target and competition shooting.
  • The Glock 40 Gen 4 has a vibrant aftermarket for parts and accessories.

Introduction to the Glock 40

The Glock 40 is a formidable handgun that was introduced as a chambered in 10mm round, catering to the demands of avid shooters. With its 6-inch long barrel and long slide, the Glock 40 bears a resemblance to the Glock 17L, known for its extended barrel length.

One of the Glock 40’s standout features is its compatibility with aftermarket parts and accessories. This allows users to enhance and customize their firearm to suit their individual preferences and needs. The Glock 40’s popularity among competitive shooters is further bolstered by its long sight radius, offering improved accuracy and target acquisition, as well as its full-size grip, providing a comfortable and secure hold.

The Glock 40’s design and performance make it a versatile firearm that appeals to a wide range of shooters. Whether using it for target shooting or engaging in competition, the Glock 40 delivers the power, reliability, and accuracy that discerning shooters seek. In the next section, we will delve into the design and ergonomics of the Glock 40.

Design and Ergonomics

The Glock 40 MOS is a semi-automatic, striker-fired pistol renowned for its exceptional design and ergonomic features. Its robust construction ensures durability and reliability in various shooting conditions. The Glock 40 features a barrel length of 6.02 inches and an overall length of 9.49 inches, making it a full-size handgun that offers superb accuracy and stability.

One of the standout design elements of the Glock 40 is its versatile MOS configuration, which stands for Modular Optic System. This allows shooters to mount reflex sights, red dot optics, or other tactical accessories directly onto the handgun’s slide, enhancing target acquisition speed and accuracy. The ability to customize the optics adds an extra layer of versatility, catering to individual shooting preferences and requirements.

When it comes to ergonomics, the Glock 40 excels in providing a comfortable and natural grip. It offers multiple backstrap options that can be easily replaced to fit different hand sizes and preferences. This allows users to achieve a personalized and secure grip, promoting better control and improved shooting performance.

In addition to its ergonomic grip design, the Glock 40 features a unique textured frame, ensuring a firm and slip-resistant hold even in challenging conditions. This texture enhances the overall handling and ergonomics of the handgun, providing shooters with a confident and stable grip.

The Glock 40 MOS also boasts a user-friendly trigger system that offers a consistent and crisp break. The trigger pull weight is designed to provide a balance between safety and performance, allowing for smooth and precise shots.

Overall, the Glock 40’s thoughtful design and ergonomic features contribute to its exceptional performance and ease of use. Whether in target shooting or self-defense scenarios, the Glock 40 delivers a reliable and comfortable shooting experience.

Glock 40 design

Shooting Performance

The Glock 40 is known for its impressive shooting performance, making it a favorite among shooters looking for power and accuracy. Let’s delve into its key features that contribute to its exceptional performance.

Manageable Recoil and Control

One standout aspect of the Glock 40 is its manageable recoil, despite its chambering in the powerful 10mm Auto cartridge. This is attributed to the gun’s heft and polymer frame, which help absorb and distribute recoil energy effectively. As a result, shooters can maintain control and stay on target, even during rapid-fire shooting sessions or when firing heavy loads.

Ideal for Longer Distance Shooting

The Glock 40’s long sight radius, combined with the minimal bullet drop of the 10mm round, makes it an excellent choice for longer distance shooting. The longer barrel length of 6 inches provides increased accuracy and velocity, allowing shooters to engage targets with precision. This makes the Glock 40 suitable for range shooting, competition shooting, and even hunting.

Additionally, the Glock 40’s substantial slide aids in absorbing the recoil generated by the 10mm Magnum round. This ensures that shooters can maintain stability and control while firing powerful rounds, further enhancing the gun’s shooting performance.

Glock 40 shooting performance

Overall, the Glock 40’s shooting performance is a testament to its design and engineering. Its manageable recoil, long sight radius, and compatibility with the 10mm Auto cartridge make it a formidable handgun for shooters who prioritize accuracy and performance.

Maintenance and Parts

Glock handguns, including the Glock 40, are renowned for their exceptional reliability and durability. With its solid construction, the Glock 40 requires minimal maintenance, allowing you to focus on your shooting experience without constant upkeep. It is built to perform in various conditions, making it a reliable choice for outdoor enthusiasts, law enforcement professionals, and competitive shooters.

One of the advantages of owning a Glock 40 is its vibrant aftermarket. The Glock 40 aftermarket offers a wide range of parts and accessories that allow you to customize and enhance your firearm to suit your preferences and shooting style. From extended magazines to upgraded triggers and slide plates, there are numerous options available to optimize your Glock 40’s performance.

While the Glock 40 shares many parts with other Glock models, it’s essential to note that some components are unique to the 10mm chambering. This ensures that the gun reliably handles the higher pressure and power of the 10mm cartridge. Glock has designed the Glock 40 with precision engineering to withstand the demands of the 10mm round, offering a reliable and consistent shooting experience.

A standout feature of the Glock 40 is the MOS slide cut, which stands for Modular Optic System. This feature enables easy attachment of various reflex optics, allowing you to improve your accuracy and target acquisition speed. The MOS slide cut enhances your shooting capabilities and gives you the flexibility to explore different optics options currently available on the market.

Glock 40 aftermarket parts image

Whether you are a competitive shooter looking to optimize your Glock 40’s performance or a firearm enthusiast interested in personalizing your handgun, the Glock 40’s aftermarket offers a wealth of options to suit your needs.


In the 10mm Magnum space, the Glock 40 fills a unique niche. While other companies offer 10mm revolvers or 1911-based pistols, the Glock 40 stands out as a polymer-framed option. Its competitors in this category include the Springfield XD-M 5.25″ Competition Series, which closely approximates the Glock 40’s features and performance.

When it comes to competing in shooting competitions, the Glock 40 is a formidable choice. However, for those who are open to alternatives, the Springfield XD-M 5.25″ Competition Series offers a comparable option. This series from Springfield Armory is specifically designed for competitive shooting, with features that enhance accuracy, control, and speed.

The XD-M 5.25″ Competition Series comes with a 5.25-inch barrel, slightly shorter than the Glock 40’s 6-inch barrel. Both pistols have MOS configurations that allow for the mounting of reflex sights, ensuring quick target acquisition. The Glock 40 and Springfield XD-M 5.25″ Competition Series have similar magazine capacities, with the Glock 40 holding 15 rounds of 10mm and the XD-M holding 20 rounds of .40 S&W.

While the Glock 40’s polymer frame offers lightweight durability, the Springfield XD-M features a more traditional polymer frame combined with a steel slide. Both pistols provide excellent ergonomics and a comfortable grip, allowing for extended shooting sessions without fatigue.

Ultimately, the choice between the Glock 40 and the Springfield XD-M 5.25″ Competition Series comes down to personal preference. Both pistols are reliable, accurate, and suitable for competitive shooting. It’s advisable to try both options and see which one feels more comfortable and suits your shooting style before making a decision.


The Glock 40 Gen 4 is a powerful and reliable handgun that has gained popularity among shooting enthusiasts, especially those in the target and competition shooting scene. Its chambering in the 10mm Auto round provides exceptional performance and accuracy, allowing shooters to achieve impressive velocities and maintain tight groupings. Whether you’re a seasoned competitor or an avid target shooter, the Glock 40 Gen 4 delivers.

However, it’s important to note that the Glock 40 Gen 4 may not be the ideal choice for concealed carry. Its size and long barrel make it challenging to conceal effectively, limiting its suitability for everyday carry purposes. If concealment is a top priority, there are other Glock models that may better suit your needs.

What sets the Glock 40 Gen 4 apart is its compatibility with aftermarket parts and accessories. This allows shooters to customize their firearm according to their preferences and requirements. Whether it’s adding a reflex sight for faster and more precise target acquisition or installing a different grip option for improved ergonomics, the Glock 40 Gen 4 offers versatility in customization.

In conclusion, the Glock 40 Gen 4 is a solid choice for shooters seeking a powerful and reliable handgun for target and competition shooting. Its exceptional performance and accuracy, coupled with its compatibility with aftermarket parts and accessories, make it a favorite among enthusiasts in the shooting community. While it may not be the most concealable option, its strengths lie in other areas that are highly valued by those seeking a formidable firearm.


What is the Glock 40 Gen 4 chambered in?

The Glock 40 Gen 4 is chambered in the powerful 10mm round.

What is the barrel length of the Glock 40?

The Glock 40 has a 6-inch long barrel.

Can the Glock 40 be customized?

Yes, the Glock 40 is known for its compatibility with aftermarket parts and accessories, allowing users to customize their gun to their preferences.

Is the Glock 40 suitable for concealed carry?

Due to its size and long barrel, the Glock 40 may be difficult to conceal for concealed carry.

How many rounds does the Glock 40 hold?

The Glock 40 has a capacity of 15 rounds of 10mm.

Does the Glock 40 offer different grip options?

Yes, the Glock 40 offers a variety of grip options with replaceable backstraps.

How is the shooting performance of the Glock 40?

The Glock 40 delivers impressive shooting performance with manageable recoil and is easy to control.

Is the Glock 40 reliable?

Yes, Glock handguns are known for their reliability, and the Glock 40 is no exception.

Can I mount reflex sights on the Glock 40?

Yes, the Glock 40 MOS configuration allows for the mounting of reflex sights.

What are the alternatives to the Glock 40?

The Glock 40’s competitors in the 10mm space include the Springfield XD-M 5.25″ Competition Series, which closely approximates its features and performance.

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