Glock 21 Gen 4

Exploring the Glock 21 Gen 4: A Complete Guide

Did you know that the Glock 21 Gen 4 is one of the most popular .45 Auto pistols in the world? With its impressive features and reliability, it has become a top choice for law enforcement, military personnel, and firearm enthusiasts alike. Whether you’re looking for a dependable self-defense weapon or a versatile range pistol, the Glock 21 Gen 4 offers the performance and customization options you need. Let’s dive into the details and explore everything this powerhouse handgun has to offer.

Key Takeaways:

  • The Glock 21 Gen 4 is a highly popular .45 Auto pistol known for its reliability and versatility.
  • It is favored by law enforcement agencies and military personnel around the world.
  • The Glock 21 Gen 4 offers impressive features and customization options for a personalized shooting experience.
  • It has a high magazine capacity, accurate performance, and manageable recoil.
  • Whether for self-defense or range shooting, the Glock 21 Gen 4 is a reliable and trusted choice.

Overview of Glock 21

The Glock 21 is a full-sized pistol chambered in the .45 Auto caliber, making it a powerful and reliable choice for firearm enthusiasts. With its high-capacity double-stack magazine, ergonomic design, and Gen4 enhancements, the Glock 21 offers a combination of firepower, accuracy, and ease of use.

Key Features of the Glock 21:

  • Full-sized pistol suitable for various shooting applications
  • Chambered in the .45 Auto caliber for excellent stopping power
  • Double-stack magazine with a capacity of up to 13 rounds
  • Lightweight and durable polymer frame
  • Gen4 enhancements for customizable grip options

The Glock 21 is designed to meet the demands of law enforcement, self-defense, and target shooting. Its full-sized frame provides a comfortable grip and superior control, allowing for accurate and consistent shooting. The high magazine capacity ensures that users have enough rounds to address any situation effectively.

Glock 21 Specifications
Caliber .45 Auto
Barrel Length 4.6 inches
Slide Length 7.59 inches
Weight 26.28 ounces
Overall Length 8.22 inches
Width 1.27 inches
Magazine Capacity 13 rounds

Design and Features

The Glock 21 is designed with several standout features that enhance its performance and usability. Let’s take a closer look at what sets this pistol apart:

Double-Stack Magazine

The Glock 21 boasts a double-stack magazine, allowing for a high capacity of 13 rounds. This generous ammunition capacity ensures that users have ample firepower for various shooting scenarios.

Polymer Frame

The pistol’s polymer frame offers a winning combination of lightweight construction and durability. This not only makes the Glock 21 comfortable to carry but also ensures its longevity and resistance to wear and tear.

Low Bore Axis

The Glock 21 features a low bore axis, which refers to the relative position of the barrel in relation to the shooter’s hand. This design element helps reduce felt recoil and muzzle flip, resulting in improved accuracy and faster target acquisition.

Trigger Safety

Safety is a primary concern for any firearm, and the Glock 21 doesn’t disappoint. It is equipped with a trigger safety, a mechanism that prevents accidental discharges by requiring a deliberate pull of the trigger to engage the firing mechanism.

The Glock 21 also offers other notable design elements, such as a fixed front sight and an adjustable rear sight for precise aiming. Additionally, its grip angle promotes a natural and comfortable hold, optimizing control and shooting performance.

To get a better visual understanding of the Glock 21’s design and features, take a look at this image:

Glock 21 Gen4 vs Gen5

The Glock 21 Gen4 and Gen5 models are both highly reliable and accurate pistols. Each offers its own unique features and improvements, making them popular choices for shooters. Let’s take a closer look at the similarities and differences between these two generations of the Glock 21.

Gen4 Features

The Glock 21 Gen4 incorporates several enhancements over its predecessors. One notable feature is the soft recoil spring assembly, which helps to reduce felt recoil and improve control during rapid fire. Additionally, the Gen4 model boasts a modular back-strap system, allowing the shooter to adjust the grip size for optimal comfort and ergonomics. This customization feature ensures that the Glock 21 Gen4 can be tailored to fit a variety of hand sizes and preferences.

Gen5 Improvements

The Glock 21 Gen5 builds upon the success of the Gen4 with further improvements. One significant upgrade is the improved trigger pull, providing a crisper and more consistent break. This enhances the overall shooting experience and contributes to improved accuracy. Another notable feature of the Gen5 is the addition of an ambidextrous slide stop, allowing for easy manipulation of the slide whether you are left or right-handed. Additionally, the Gen5 incorporates a flared magwell, making it easier and faster to reload magazines under stress or in competitive shooting scenarios.

Comparing Performance

Both the Glock 21 Gen4 and Gen5 offer exceptional performance. Their double-stack magazines provide a generous capacity of 13 rounds, allowing for more rounds on hand before needing to reload. This makes them suitable for a variety of shooting applications, including self-defense, competition, and duty use. With their reliable and consistent performance, these pistols are trusted by law enforcement agencies and firearm enthusiasts alike.

Glock 21 Gen4 vs Gen5

When it comes to choosing between the Glock 21 Gen4 and Gen5, it ultimately comes down to personal preference and individual needs. The Gen4 offers customization options and a soft recoil spring assembly, while the Gen5 features an improved trigger pull and ambidextrous slide stop. Whichever model you choose, you can trust in the Glock 21’s reliability, accuracy, and versatility.

Technical Specifications

When considering the Glock 21, it’s essential to take a closer look at its technical specifications. Here are the key details:

Specifications Details
Barrel Length 4.6 inches
Slide Length 7.59 inches
Weight 26.28 ounces
Overall Length 8.22 inches
Width 1.27 inches
Magazine Capacity 13 rounds

With a barrel length of 4.6 inches and a slide length of 7.59 inches, the Glock 21 provides a balanced combination of control and accuracy. It weighs 26.28 ounces, making it easy to handle while maintaining stability during shooting. The overall length of 8.22 inches and width of 1.27 inches contribute to the Glock 21’s comfortable grip and natural pointing ability.

The magazine capacity of 13 rounds ensures ample firepower, making it suitable for various shooting scenarios. Whether for self-defense or target shooting, the Glock 21 is well-equipped to handle the demands of its users.

Glock 21

Shooting Performance

The Glock 21 is renowned for its remarkable accuracy and manageable recoil. Equipped with a rifled barrel, this firearm delivers improved precision and ensures that your shots hit their mark. Whether you’re honing your skills at the shooting range or relying on the Glock 21 for self-defense purposes, its exceptional accuracy will instill confidence in every shot you take.

Additionally, the Glock 21 offers a comfortable grip angle that reduces muzzle flip, allowing for more controlled and steady shooting. This ergonomic design feature enhances the overall shooting experience, minimizing fatigue and maximizing accuracy. Whether you have small or large hands, the Glock 21 provides a secure and comfortable grip, ensuring that you maintain optimal control throughout your shooting sessions.

Furthermore, the Glock 21’s shooting experience is enhanced by its built-in safety features, reinforcing reliable and safe operation. These safety mechanisms give you peace of mind, knowing that your Glock 21 will only fire when intended, preventing accidental discharges and ensuring a secure shooting experience. The combination of accuracy, recoil control, and safety features make the Glock 21 a top choice for both professional shooters and firearms enthusiasts alike.

Key Points:

  • Superb accuracy ensures precise and effective shooting.
  • Manageable recoil allows for better control and follow-up shots.
  • Ergonomic grip design reduces muzzle flip for steady shooting.
  • Built-in safety features provide reliable and safe operation.

Safety and Reliability

The Glock 21 is renowned for its exceptional safety features, ensuring that users can rely on its performance when it matters most. Whether for self-defense or law enforcement purposes, the Glock 21 is designed to provide peace of mind. Let’s explore some of its key safety features:

  • Trigger Safety: The Glock 21 is equipped with a trigger safety mechanism that prevents accidental discharges. This feature ensures that the firearm will only fire when intentional pressure is applied to the trigger.
  • Firing Pin Safety: Another essential safety component in the Glock 21 is the firing pin safety. It prevents the firing pin from moving forward unless the trigger is pulled, preventing the gun from firing unexpectedly.
  • Drop Safety: The Glock 21 incorporates a drop safety mechanism, which prevents unintentional firing even if the handgun is accidentally dropped, enhancing overall reliability and user confidence.

In addition to its safety features, the Glock 21 is highly reliable. It has gained a solid reputation among shooters for its durability and consistent performance. The Glock 21 is built to withstand rigorous conditions, ensuring that it functions reliably and consistently through extensive use.

Furthermore, the Glock 21 has a track record of ammunition compatibility, specifically chambered for .45 ACP rounds. .45 ACP is a popular and widely available caliber, chosen for its stopping power and effectiveness. The Glock 21’s compatibility with this ammunition ensures that users have access to a reliable and proven round for self-defense and other shooting applications.

With its robust safety features, reliability, and ammunition compatibility, the Glock 21 offers a trusted and dependable firearm option for shooters seeking both performance and peace of mind.

Customization and Accessories

The Glock 21 is a firearm that offers extensive customization options, allowing gun enthusiasts to personalize their Glock 21 according to their individual preferences. With a wide range of aftermarket accessories available, Glock 21 owners have the freedom to enhance their shooting experience and optimize their weapon’s performance.

One of the most sought-after customization options for the Glock 21 is the addition of custom slides, which can not only enhance the aesthetics but also improve the firearm’s functionality. Upgrading to a custom slide allows for the integration of red dot sights or other optics for improved accuracy and target acquisition. Additionally, aftermarket barrels can offer enhanced accuracy and reduced recoil.

In addition to slides and barrels, aftermarket magazines and grips are popular accessories for the Glock 21. Extended magazines provide increased ammunition capacity, ensuring shooters have more rounds at their disposal. Upgraded grips can offer better ergonomics and a more comfortable shooting experience, ultimately improving accuracy and control. These accessories allow Glock 21 owners to tailor their firearm to their specific needs and preferences.

When it comes to aftermarket parts, Ghost Inc is a trusted source for Glock 21 modifications and accessories. They offer a comprehensive selection of parts and accessories specifically designed for Glock firearms, including the Glock 21. Whether it’s enhancing the aesthetics, improving performance, or personalizing the grip, Ghost Inc provides the necessary tools for Glock 21 owners to fully customize their firearm.


What is the Glock 21 Gen 4?

The Glock 21 Gen 4 is a versatile and customizable firearm chambered for the .45 Auto round. It is the fourth generation variant of the Glock 21 pistol.

What are the features of the Glock 21 Gen 4?

The Glock 21 Gen 4 features a modular back strap system, reversible magazine catch, and a 117mm barrel length. It also has a double-stack magazine with a capacity of up to 13 rounds.

What are the specifications of the Glock 21 Gen 4?

The Glock 21 Gen 4 has a barrel length of 4.6 inches, a slide length of 7.59 inches, and an overall length of 8.22 inches. It weighs 26.28 ounces and has a magazine capacity of 13 rounds.

Is the Glock 21 Gen 4 accurate?

Yes, the Glock 21 Gen 4 is known for its accuracy. It has a rifled barrel that improves shot placement and a comfortable grip angle that reduces muzzle flip.

Is the Glock 21 Gen 4 safe to use?

Yes, the Glock 21 Gen 4 has built-in safety features, including a trigger safety, firing pin safety, and drop safety. These features prevent accidental discharges and ensure safe operation.

Can I customize my Glock 21 Gen 4?

Yes, the Glock 21 Gen 4 is highly customizable. There are a wide range of aftermarket accessories available, including custom slides, barrels, magazines, and grips.

Where can I buy a Glock 21 Gen 4?

The Glock 21 Gen 4 can be purchased from authorized firearms dealers and online retailers that sell firearms.

What is the review of the Glock 21 Gen 4?

The Glock 21 Gen 4 has received positive reviews for its reliability, accuracy, and ease of use. It is highly regarded among firearm enthusiasts and professionals.

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