Glock 21 Gen4 .45 Auto Pistol: Proven Reliability for Home Defense

When choosing a dependable handgun for home defense or range work, reliability, ergonomics, and proven performance are the priorities. An experienced shooter wants a platform that balances stopping power with manageable recoil and solid magazine capacity for defensive scenarios.

GLOCK 21 G4

GLOCK 21 G4 .45 AUTO full-size pistol left-side view

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HWK XL 5.56 Giveaway

Live now • Ends Feb 1, 2026
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Deadline: Feb 1, 2026
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GLOCK 21 G4 in .45 AUTO is a full-size, duty-grade pistol built around a straightforward, hard-working design. The Gen4 frame includes a modular backstrap system and a rough textured frame (RTF) to improve grip purchase under stress or with wet hands. The slide sports an nDLC matte finish showing only light wear on edges for a used but mechanically sound firearm. This listing comes with the original Glock hard case, one 13-round factory magazine, a cleaning brush, and paperwork—all included with the $550.99 price point. Shop this product

Why the .45 AUTO matters

.45 AUTO remains a preferred defensive caliber for shooters who value terminal performance and momentum. In a full-size platform like the GLOCK 21 G4, the 13-round factory capacity mitigates the traditional trade-off between larger caliber and magazine count. Polygonal rifling in the bore promotes consistent velocity and easy cleaning, contributing to reliable accuracy during routine training and defensive drills.

Key features and field considerations

Ergonomics and control

The Gen4 modular backstrap system lets users tailor the grip circumference to hand size, improving trigger reach and recoil control. The rough textured frame gives a positive purchase without aggressive abrasiveness—useful for long training sessions.

Durability and condition

The slide’s nDLC finish and the polymer frame show normal, minor handling wear but the firearm is described as fully operational with a bright, clean bore. The included original hard case protects the pistol in storage or transport.

Practical use and legal notes

This GLOCK 21 G4 is suited for home defense, duty carry in permitted roles, and regular range practice. Buyers must confirm federal, state, and local compliance regarding handgun and magazine ownership before purchase; do not buy if the firearm or magazine capacity is restricted in your area. View product details and pricing

GLOCK 21 G4 .45 AUTO close-up of slide and controls

For shooters seeking a proven full-size .45 AUTO with practical magazine capacity and factory essentials included, the GLOCK 21 G4 is a sensible, cost-effective option at $550.99. Check availability and complete your purchase on our shop page where the retailer listing and purchase options are provided. Check current availability

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People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.

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