Buy Glock 21 Gen3 SF .45 ACP Pistol

Glock 21 Gen3 SF .45 ACP Pistol: High-Capacity Power Meets Versatility

The Glock 21 Gen4 is a modernized version of Glock’s iconic .45 ACP pistol, featuring enhancements like interchangeable backstraps, a dual recoil spring assembly for reduced felt recoil, and a larger magazine release for easier operation. Combining Glock’s signature reliability with ergonomic upgrades, the Gen4 model is a top choice for duty, self-defense, and competitive shooting.

Shop for the Glock 21 Gen4 for sale, holsters, threaded barrels, and accessories at glock4u.com.

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Key Features of the Glock 21 Gen4

Specification	Details
Model	Glock 21 Gen4
Caliber	.45 ACP
Capacity	13+1 rounds (10-round option available for restricted states)
Barrel Length	4.60 inches
Frame Design	Interchangeable backstraps for a customizable grip
Recoil System	Dual recoil spring assembly for reduced recoil
Magazine Release	Enlarged, reversible for left-handed shooters
Included Accessories	Three 13-round magazines, backstrap set

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Glock 21 Gen4 Design and Ergonomics

The Glock 21 Gen4 builds upon the classic design with improvements that enhance usability for a wide range of shooters:

1. Interchangeable Backstraps

The modular backstrap system allows users to adjust the grip size to fit their hand, making the Glock 21 Gen4 comfortable for shooters of all sizes.

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2. Dual Recoil Spring Assembly

This upgraded recoil system reduces felt recoil and extends the service life of the pistol, making it easier to handle the power of the .45 ACP cartridge.

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3. Enlarged Magazine Release

The Gen4 features a larger, reversible magazine release, offering faster reloads and accommodating both right- and left-handed shooters.

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4. Polymer Frame

Glock’s lightweight, durable polymer frame absorbs recoil and resists wear, ensuring reliable performance even in tough conditions.

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Performance and Versatility

The Glock 21 Gen4 is designed for power, precision, and versatility, excelling in a variety of shooting scenarios:

1. .45 ACP Stopping Power

With its high-capacity 13+1 magazine, the Glock 21 Gen4 delivers reliable stopping power for self-defense, duty use, and tactical applications.

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2. Accuracy and Reliability

The Glock 21 is known for its consistent accuracy and dependable cycling, even in harsh environments.

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3. Tactical and Recreational Use

From duty use to recreational shooting, the Glock 21 Gen4 performs flawlessly, thanks to its robust construction and adaptable design.

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Top Accessories for Glock 21 Gen4

Elevate your Glock 21 Gen4 with these essential accessories and upgrades, all available at glock4u.com:

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1. Glock 21 Gen4 Threaded Barrel

A threaded barrel expands the Glock 21’s capabilities, enabling the use of suppressors and compensators.

Recommended Threaded Barrels:

• Lone Wolf Threaded Barrel: Durable and precision-machined for accuracy.
• ZEV Technologies Match Threaded Barrel: Enhances performance while adding suppressor compatibility.

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2. Glock 21 Gen4 Magazine Extensions

Boost your capacity with extended magazines or mag extensions.

Top Options:

• Taran Tactical Base Pads: Add 2-5 rounds to your magazines.
• Glock OEM Extended Magazines: Factory reliability with increased capacity (up to 26 rounds).

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3. Glock 21 Gen4 Slide with Optic Cut

Upgrade your slide to accommodate red dot optics for faster target acquisition.

Recommended Slides:

• ZEV Technologies RMR Cut Slide: Pre-cut for Trijicon RMR and other popular optics.
• Brownells RMR Cut Slide: A budget-friendly option for adding optics capability.

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4. Glock 21 Gen4 Holsters

Choose a holster that fits your carry style and use case:

Top Holster Picks:

• Safariland 578 GLS Pro-Fit OWB Holster: Secure fit with easy draw for duty use or open carry.
• Alien Gear Cloak Tuck 3.5 IWB Holster: Perfect for concealed carry, offering comfort and adjustability.
• Kenai Chest Holster: Ideal for hunters or outdoor enthusiasts.

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5. Glock 21 Gen4 Trigger Upgrades

Improve your shooting experience with a smoother, lighter trigger pull.

Recommended Triggers:

• ZEV Technologies Fulcrum Trigger: Fully adjustable for pre-travel and over-travel.
• Apex Tactical Action Enhancement Trigger: Delivers a crisp, clean break.

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6. Glock 21 Gen4 Sights

Upgrade your sights for better performance in any lighting condition.

Best Glock 21 Sights:

• Trijicon HD XR Night Sights: Perfect for low-light and defensive scenarios.
• Ameriglo Bold Sights: Bright and easy to acquire in all lighting conditions.

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Glock 21 Gen4 Pricing and Availability

Model	Price Range
Glock 21 Gen4	Starting at $599.99
Used Glock 21 Gen4	Starting at $450 (depending on condition)

All packages include:

• Three 13-round magazines.
• Backstrap set for grip customization.
• Glock’s durable factory case.

Shop for the Glock 21 Gen4 for sale at glock4u.com.

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Glock 21 Gen4 Review: Why Shooters Love It

Pros

• High Capacity: 13+1 rounds in .45 ACP.
• Ergonomic Design: Customizable grip with interchangeable backstraps.
• Proven Reliability: Glock’s track record of dependability under all conditions.
• Customizability: Compatible with a wide range of aftermarket parts.

Cons

• Recoil: While reduced by the dual recoil spring, .45 ACP has more kick than smaller calibers.
• Size: The full-size frame may not be ideal for concealed carry.

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Frequently Asked Questions About Glock 21 Gen4

1. What’s the Price of the Glock 21 Gen4?

The Glock 21 Gen4 typically starts at $599.99 for new models, with used options available for as low as $450.

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2. Can I Add a Red Dot Optic to the Glock 21 Gen4?

Yes, but the standard Gen4 slide will require milling for an optic cut, or you can upgrade to an aftermarket slide with a pre-cut design, such as the ZEV RMR Cut Slide.

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3. Is the Glock 21 Gen4 Good for Concealed Carry?

While it’s possible to conceal the Glock 21 Gen4 with the right IWB holster, its large frame makes it better suited for open carry or duty use.

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4. What’s the Best Holster for the Glock 21 Gen4?

The Safariland 578 GLS Pro-Fit Holster is a top choice for open carry, while the Alien Gear Cloak Tuck IWB Holster is great for concealed carry.

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Conclusion

The Glock 21 Gen4 offers .45 ACP power, Glock’s legendary reliability, and modern ergonomic features like customizable backstraps and reduced recoil. Whether for duty, self-defense, or sport shooting, this pistol excels in performance and adaptability.

Shop for the Glock 21 Gen4 for sale, along with the best holsters, threaded barrels, and upgrades, at glock4u.com. Order today and experience the precision and power of the Glock 21!