Glock 21 Gen4 — Power, Precision, and Proven Reliability

Introduction to Glock 21 Gen4

The Glock 21 Gen4 is a full-sized semi-automatic pistol chambered in .45 ACP, designed to deliver maximum stopping power with Glock’s legendary reliability. Built for law enforcement, personal defense, and professional use, it embodies the perfect balance between power, control, and durability. As part of Glock’s fourth-generation lineup, the Gen4 model refines the design with enhanced ergonomics, reduced recoil, and greater adaptability for all shooters.

Design and Features

The Glock 21 Gen4 features Glock’s signature polymer frame paired with a steel slide and a corrosion-resistant matte finish. Its robust construction ensures long-lasting performance even under the harshest conditions.

A standout feature is the dual recoil spring assembly, designed to minimize felt recoil and extend the service life of the pistol. The interchangeable backstrap system allows shooters to customize the grip size, offering improved comfort and control for various hand sizes.

With a standard magazine capacity of 13 rounds and optional extended magazines, the Glock 21 Gen4 provides impressive firepower in a manageable, well-balanced platform. Its simple design and textured grip ensure a secure hold during rapid firing, contributing to its reputation as one of the most controllable .45 ACP pistols available.

Performance and Accuracy

Engineered for reliability and consistency, the Glock 21 Gen4 delivers accurate shot placement with minimal muzzle rise. Its Safe Action System — comprising a trigger safety, firing pin safety, and drop safety — ensures secure operation while maintaining a smooth and predictable trigger pull.

The pistol’s 4.61-inch barrel and 7.59-inch overall length provide excellent sight radius for precise aiming. Whether used on the range or in tactical scenarios, the Glock 21 Gen4 maintains consistent accuracy and dependability across thousands of rounds.

Thanks to its powerful .45 ACP cartridge, shooters benefit from superior stopping power — ideal for self-defense and law enforcement duties.

Maintenance and Customization

True to Glock’s design philosophy, the Glock 21 Gen4 is remarkably easy to maintain. Disassembly requires no special tools, and routine cleaning is quick and straightforward.

The pistol’s modular design supports a wide range of aftermarket upgrades and accessories, including:

• Night sights and red-dot optics

• Tactical lights and lasers

• Extended magazines and mag wells

• Custom triggers and grips

This level of customization allows users to configure their Glock 21 Gen4 for personal defense, competition, or tactical use.

Advantages of the Glock 21 Gen4

✅ Chambered in powerful .45 ACP for maximum stopping force
✅ Reduced recoil with dual spring assembly
✅ Interchangeable backstraps for customizable ergonomics
✅ High-capacity 13-round magazine
✅ Proven Glock reliability and ease of maintenance

Conclusion

In summary, the Glock 21 Gen4 stands as one of the most capable .45 ACP pistols in its class. Its combination of power, precision, and durability makes it a trusted sidearm for professionals and civilians alike. Whether for home defense, duty carry, or range shooting, the Glock 21 Gen4 delivers performance you can depend on — shot after shot.

Quick Specs

• Manufacturer: Glock GmbH

• Model: Glock 21 Gen4

• Caliber: .45 ACP

• Barrel Length: 4.61 in (117 mm)

• Overall Length: 7.59 in (193 mm)

• Weight (Unloaded): 29.3 oz (830 g)

• Magazine Capacity: 13 rounds (standard)

• Frame Material: Polymer

• Safety System: Glock Safe Action (3 internal safeties)