https://us.glock.com/en/pistols/g21-gen4
The Glock 21 is a large-frame .45 ACP semi-automatic pistol offering a 13+1 round capacity in its polymer frame. You’ll find Glock’s Safe Action trigger system, distinctive octagonal barrel rifling, and a 4.61-inch barrel length. It weighs 25.93 ounces unloaded and measures 8.07 inches overall. While you’ll experience more felt recoil than 9mm variants, it delivers reliable terminal performance and low maintenance requirements. There’s much more to understand about this proven-duty pistol’s capabilities.
Key Takeaways
- The Glock 21 is a .45 ACP semi-automatic pistol with a 13-round magazine capacity and polymer frame construction.
- Features Glock’s Safe Action trigger system and distinctive octagonal barrel rifling for enhanced accuracy and reliability.
- Weighs 25.93 ounces unloaded with a 4.61-inch barrel length, making it suitable for duty and home defense purposes.
- Typical retail price ranges from $500-650, with special pricing available for law enforcement and military personnel.
- Offers reliable performance and low maintenance requirements, though recoil may be challenging for shooters with smaller hands.
Description
The Glock 21 represents a large-frame semi-automatic pistol chambered in .45 ACP, delivering substantial stopping power through its 13-round magazine capacity.
The polymer frame features Glock’s Safe Action system and distinctive octagonal barrel rifling. The GLOCK 21 Gen4 variant offers a modular backstrap design with reduced receiver circumference, enhancing ergonomic control. You’ll find various finishes available, including OD Green options.
Price Range
Market pricing for the Glock 21 positions this .45 ACP pistol between $599-699 MSRP, with street prices typically running $500-650 through authorized dealers. You’ll find varying price points based on several market factors:
| Price Category | Price Range |
|---|---|
| MSRP | $599-699 |
| Street Price | $500-650 |
| LE/Military | Special Pricing |
| Secondary Market | $400-500 |
| Custom Models | $700+ |
For optimal value acquisition, you’ll find competitive pricing through authorized distributors, while the secondary market offers additional cost savings on pre-owned units.
Specifications
The Glock 21’s polymer frame and steel slide assembly offers you a full-size .45 ACP platform weighing 735g (25.93 oz) unloaded. You’ll find its 117mm (4.61-inch) barrel delivers consistent accuracy through the 170mm sight radius when using GNS sights. The pistol’s 13-round standard magazine capacity provides substantial firepower in the .45 ACP chambering, while maintaining compact dimensions with a 205mm overall length.
| Specification | Metric | Imperial |
|---|---|---|
| Weight (unloaded) | 735g | 25.93 oz |
| Barrel Length | 117mm | 4.61 in |
| Overall Length | 205mm | 8.07 in |
| Height | 140mm | 5.51 in |
| Magazine Capacity | 13 rounds | 13 rounds |
Weight
Every ounce of the Glock 21’s 735-gram (25.93 oz) unloaded weight contributes to its optimal handling characteristics. You’ll find this lightweight design strikes an engineered balance between portability and recoil management.
The GLOCK’s weight distribution enhances your control during rapid target transitions while maintaining the stability necessary for effective .45 ACP platform performance. The weight specs ensure responsive maneuverability without sacrificing control.
Barrel Length
Measuring precisely 117 millimeters (4.61 inches), Glock 21’s barrel length delivers optimal terminal ballistics for the .45 ACP cartridge. You’ll find this consistent barrel length across all generations, providing an ideal balance between maneuverability and ballistic performance.
The manufacturer’s proprietary octagonal rifling enhances accuracy and reliability, optimizing the .45 ACP round’s flight characteristics in this full-size platform.
Material Made Out Of
Constructed with a polymer frame and stainless steel slide, Glock 21’s material composition delivers optimal strength-to-weight characteristics. The polymer frame provides durability while reducing overall mass, complemented by the precision-engineered stainless steel slide.
The steel barrel, measuring 117 mm in length, integrates seamlessly with these core components to maintain structural integrity under sustained firing conditions.
Chambered In
The Glock 21 chambers the venerable .45 ACP cartridge, delivering substantial stopping power while maintaining controllable recoil characteristics. You’ll find this auto caliber performs with remarkable efficiency through the pistol’s Safe Action system, which helps manage the light recoil despite the round’s power.
The standard 13-round capacity offers significant firepower while adapting comfortably to various hand sizes through ergonomic design.
Capacity
Standard magazine configurations for the Glock 21 accommodate 13 rounds of .45 ACP ammunition, striking an optimal balance between firepower and ergonomics.
You’ll find a reduced-capacity 10-round magazine variant available for jurisdictions with specific restrictions. The magazine’s engineered design ensures consistent feeding reliability while maintaining the pistol’s operational integrity, delivering substantial magazine capacity for both defensive and recreational applications.
Trigger Pull
Featuring a precisely engineered 28 N trigger pull, the Glock 21’s Safe Action trigger system delivers exceptional control and consistency.
You’ll experience a light, crisp break with the 72.5 mm trigger distance, optimizing your shooting ergonomics. The predictable trigger action enhances your accuracy and promotes faster follow-up shots while maintaining a reliable safety margin against unintended discharge during defensive or competitive use.
Safety?
Built around Glock’s renowned Safe Action system, your Glock 21 integrates three automatic, independently operating mechanical safeties that work in perfect sequence. This advanced safety mechanism, combined with the consistent trigger pull, ensures reliable operation while maintaining tactical readiness.
The modular backstraps enhance your grip security, providing an additional layer of handling safety during high-stress situations or rapid target engagement.
Action
How does the Glock 21’s action deliver consistent performance? You’ll find the pistol’s Safe Action system provides a uniform trigger pull throughout semi-automatic operation. This mechanism ensures reliable function while maintaining mechanical precision with each shot.
The system’s design enables smooth cycling during the firing sequence, offering you dependable performance without compromising the pistol’s inherent safety features.
Optic Ready?
While the standard Glock 21 doesn’t come factory-optic ready, you’ll find multiple options for mounting red dot sights.
The G21 MOS variant features a pre-milled slide compatible with Glock’s proprietary mounting system, offering a lower 1/3 co-witness.
For standard Gen4 and Gen5 models, you can utilize aftermarket mounting plates or professional slide milling services to achieve your desired optic configuration.
Review
You’ll find the Glock 21’s reliability stems from its robust Safe Action system and octagonal rifling, which deliver consistent shot placement and cycling with various .45 ACP loads.
The pistol’s major advantages include its 13-round capacity, excellent recoil management through the full-size frame, and modular grip customization, though the wider grip circumference may challenge shooters with smaller hands.
The G21’s durability and low maintenance requirements offset its slightly higher felt recoil compared to 9mm variants, making it a solid choice for defensive or duty use.
Pros
Despite its larger frame, the Glock 21 delivers exceptional performance as a .45 ACP service pistol through its combination of stopping power and capacity. You’ll appreciate the customizable grip with medium/large backstraps that adapt to your hand size.
| Feature | Benefit | Technical Data |
|---|---|---|
| Safe Action Trigger | Enhanced Safety | 5.5 lb Pull Weight |
| Polymer Frame | Reduced Mass | 26.1 oz Unloaded |
| Magazine Capacity | Extended Firepower | 13+1 Rounds |
| .45 ACP Caliber | Terminal Performance | 230gr Standard Load |
The lightweight polymer construction and proven reliability make it an excellent choice for defensive applications.
Cons
The Glock 21’s advantages come with notable trade-offs that merit careful consideration. You’ll experience increased recoil and muzzle rise due to the .45 ACP cartridge. The grip size and trigger reach may prove challenging for smaller hands, while the overall dimensions impact concealment potential. Consider these limitations:
| Limitation | Impact |
|---|---|
| Recoil Management | Higher felt recoil and muzzle rise |
| Frame Size | Less concealable, heavier carry |
| Magazine Capacity | Lower than comparable duty pistols |
| Ergonomics | Challenging for smaller hands |
| Parts Availability | Limited compared to other models |
Reliability
While many handguns excel in certain environments, the Glock 21’s reliability transcends typical operational parameters. You’ll find it functions flawlessly through 20,000+ rounds, thanks to its Safe Action trigger system and striker-fired design.
The pistol’s consistent performance stems from its minimalist architecture, featuring fewer moving parts than traditional handguns. This engineering approach ensures dependable operation under extreme conditions.
Similar Models
Various configurations of the Glock 21 platform serve different tactical and operational requirements. You’ll find the Subcompact (SF) model featuring a reduced receiver circumference for enhanced ergonomics.
The Gen4 variant offers modular backstraps and represents the most current iteration. All configurations maintain the Safe Action system and MH3 steel three-dot night sights while offering standard 13+1 capacity or restricted 10+1 magazines.
Similar Models From Other Manufacturers
Several manufacturers compete with Glock’s .45 ACP offering through comparable pistol designs. The Sig Sauer P220 delivers similar capacity and performance metrics, while the Springfield Armory 1911 A1 provides proven reliability with classic ergonomics.
The Smith & Wesson M&P45’s polymer frame and customizable grip modules offer adaptability to various hand sizes, complete with ambidextrous controls for enhanced operator flexibility.
Maintenance
Proper maintenance of the Glock 21 requires meticulous attention to key mechanical components and adherence to manufacturer specifications. You’ll need to regularly disassemble and clean your firearm using a specialized semi-automatic pistol cleaning kit.
Per California warnings, handle cleaning chemicals including lead with caution, as they may cause reproductive harm. Inspect components during maintenance, replacing worn parts to ensure optimal functionality.
History
Emerging in 1990, the Glock 21 marked the manufacturer’s entry into the .45 ACP market, designed specifically to meet the U.S. military’s Modular Handgun System requirements.
This semi-automatic pistol integrated Glock’s signature Safe Action system with three distinct safety mechanisms. You’ll find it gained rapid adoption among law enforcement and military users, thanks to its 13-round capacity and reliable performance.
Frequently Asked Questions
Is It Illegal to Have a Glock 21?
The legality of owning a Glock 21 depends on your location and status. You’ll need to verify local laws, as firearm regulations vary by jurisdiction.
The purchasing process requires you to pass background checks and obtain necessary permits. You must follow safety regulations including proper storage and handling protocols.
If you’re legally eligible to own firearms and comply with local restrictions, a Glock 21 is typically legal to possess.
Is the Glock 21 a Good Gun?
As reliable as a Swiss watch, you’ll find a quality pistol that delivers consistent performance in every situation. Your trigger pull will remain accurate and predictable thanks to the Safe Action system, while the modular backstrap lets you customize the comfortable grip size to your hand.
The .45 ACP’s proven stopping power combined with 13-round capacity and octagonal rifling gives you exceptional reliability. The polymer frame reduces recoil for enhanced control.
What Caliber Is a Glock G21?
The Glock G21 is chambered in .45 Auto (ACP), a powerful cartridge known for its stopping power. You’ll find this caliber delivers excellent recoil management despite its size, thanks to the pistol’s engineered design.
The .45 ACP round contributes to your shooting accuracy while maintaining significant terminal ballistic performance. With a standard magazine capacity of 13 rounds, you’re getting substantial firepower in a service-sized platform.
Is the Glock 21 Discontinued?
No, the Glock 21 isn’t discontinued at all. You’ll find it’s still actively manufactured in its Gen4 configuration.
While you’re evaluating concealed carry considerations, you’ll notice it’s a full-size pistol offering substantial magazine capacity analysis at 13+1 rounds of .45 ACP. From shooting range experiences, you’ll appreciate that it remains one of Glock’s most popular models since its 1990 introduction, with ongoing production and widespread availability.
Conclusion
You’ll find the Glock 21’s reputation for terminal ballistic performance in .45 ACP exemplifies its engineering excellence. Through proper maintenance of the polymer frame and striker-fired mechanism, you’re securing a service life that’ll span decades. While operating at standard pressures with a 13-round capacity, you’re getting a duty pistol that delivers both precision and reliability. The G21’s modular design ensures adaptability for various tactical applications.
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