For defensive shooters and professionals seeking a reliable, battle-proven platform in .45 ACP, few pistols combine proven ergonomics, American manufacture, and straightforward maintenance like this full-size Glock. Whether you train for home defense or maintain duty readiness, understanding the specific features of this example is essential for informed purchasing and responsible use.

GLOCK G21 GEN 4 — this USA-made example carries clear “MADE IN USA GLOCK, INC., SMYRNA, GA.” frame markings, a slide rollmark “GLOCK 21 Gen4 USA 45 Auto,” and a “US” marking on the barrel hood. Shop this product

Design and Build

This G21 Gen4 is a full-size, striker-fired pistol with Glock’s Safe Action trigger system and a 4.61-inch steel barrel. The matte black slide features rear serrations and fixed sights — a white-dot front and a white-outline U-notch rear — optimized for rapid sight acquisition. The frame’s polymer construction integrates Glock’s universal accessory rail and two cross pins above the trigger for proven durability.

Gen4 Ergonomics and Controls

Gen4-specific upgrades are present: the RTF grip texture with finger grooves delivers consistent purchase under recoil, and the enlarged, reversible magazine release makes reloads faster for both strong- and weak-hand shooters. The package includes one (1) Glock OEM 13-round .45 Auto magazine; standard capacity is 13+1.

Ballistics and Barrel

The 4.61-inch steel barrel uses polygonal rifling with a 1:15.75 RH twist — a combination that favors typical .45 Auto bullet weights and supports reliable accuracy. The bore and rifling on this example are reported in excellent condition, which contributes to consistent groups and dependable terminal performance for defensive loads.

Why .45 ACP?

.45 ACP remains a staple for defensive applications due to its momentum and proven stopping power in close quarters. In a full-size platform like this G21 Gen4, recoil is manageable and follow-up shots are controllable for trained shooters.

Price for this USA-made, very good condition example is $578.99. View product details and pricing

This specific GLOCK G21 GEN 4 pairs American provenance with practical Gen4 controls and a combat-ready barrel. For shooters seeking a durable, serviceable .45 ACP platform with documented origin and clean bore condition, check current availability and purchase options on our shop page. Check current availability

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.