Picking the right magazine accessories for a 5.7×28 pistol means balancing ergonomics, reliability, and legal considerations. A small, well-designed extension can improve reload speed and grip without altering the factory magazine or adding unnecessary complexity to your setup.
CMMG FIVESEVEN is a FiveSeven 10rd mag extension designed as the ultimate upgrade to your 5.7×28 pistol. Installation takes only seconds and does not permanently alter the factory magazine; the chrome silicon spring is salt water–resistant and will not take a set. Priced competitively at $15.99, this simple part delivers tangible benefits for defensive carry and range use. Shop this product
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A third-party retailer is currently hosting a giveaway for an HWK XL 5.56 pistol package (≈ $1,800 retail value).
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Why add a 10rd mag extension?
The 5.7×28 cartridge is prized for high velocity, low recoil, and controllable follow-up shots. A 10rd mag extension improves grip purchase and can slightly increase capacity or provide a more consistent hand position without changing the magazine’s internal geometry. Because this extension installs in seconds and leaves the factory body intact, it’s an excellent option for shooters who want reversible upgrades that won’t affect magazine legality or long-term value.
Installation and durability
This extension’s quick-install design means no gunsmithing and no tools in many cases. The manufacturer notes that installation “takes only seconds” and “does not permanently alter factory magazine,” which is ideal for owners who rotate magazines between pistols or need to maintain original equipment for inspections. The chrome silicon spring stands out: salt water–resistant and formulated so it “will not take a set,” it maintains consistent tension and reliability through repeated use and exposure to elements.
Field use and compatibility
Designed for Cmmg platforms and compatible models listed as Various, this extension is practical for defensive configurations, duty rigs, and range setups where quick reloads and consistent ergonomics matter. The low weight and compact profile keep concealability intact while improving handling under stress or during rapid fire drills. View product details and pricing
Where to buy and next steps
If you want a fast, reliable upgrade for a 5.7×28 pistol that preserves factory magazines, this CMMG FIVESEVEN 10rd mag extension is an economical choice at $15.99. Click the link to check current availability and complete your purchase on the shop page; you’ll be redirected to the retailer’s checkout where the item can be bought directly. Check 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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