When capacity and reliability matter, an extended magazine can change how you train, compete, or patrol. Adding a 21-round magazine to your compact striker-fired pistol reduces reload frequency and improves sustained engagement options without a complete platform change.

SIG SAUER P250/P320 is a 21round extended magazine for your P320 and P250 pistols chambered in 9mm. Shop this product

Design and compatibility

This 21-round magazine is specified for the P320 and P250 platforms chambered in 9mm. Built to interface with the factory magwell and feed geometry of those frames, it preserves lock-up and slide-to-frame relationship while increasing capacity. Because the product lists model as Various under the Sig Sauer brand, verify fit for your specific generation and grip module prior to use.

Why 9mm matters

Chambered in 9mm, this magazine supports a caliber that balances recoil, capacity, and terminal performance. For range work, defensive drills, or professional deployments, 9mm remains a practical choice thanks to ammunition availability and controllability in compact frames like the P320 and P250.

Practical benefits

An extended 21-round magazine reduces reloads during drills and matches, improving training efficiency and performance under stress. For duty or home defense scenarios, extra rounds can provide more tactical options before needing to reload. At the listed price of $36.89, this magazine offers a cost-effective capacity upgrade for shooters who want more rounds without changing platforms.

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Handling, maintenance, and best practices

Treat extended magazines like any high-use component: inspect feed lips, follower movement, and spring tension regularly. Cycle the magazine empty and loaded during function checks, and train reloads to account for the slightly altered grip profile. Store magazines unloaded for long-term spring life, and rotate them if used frequently.

For shooters running P320 or P250 platforms who want more rounds in the pipe with proven Sig Sauer compatibility, this 21-round option is a practical, affordable upgrade. 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.