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The CMMG 57AFD1E is a smart upgrade for Five-seveN owners who want extra firepower without making permanent changes to their magazines. Takes about thirty seconds to install. You just pop off the floorplate, slide the extension on, add the spring, and the floorplate goes back on. When you're done experimenting or if you need to switch things up, it comes right back off without leaving any marks on your factory magazine.
The polymer construction keeps things lightweight while the chrome silicon spring is built to handle salt water and environmental stress without losing its shape or tension over time. The extension is molded to match the contour of the Five-seveN magazine, so there's no weird bulges or awkward proportions. This is designed specifically for the older generation 20-round Five-seveN magazines and won't work with the newer models, so verify your magazine type before ordering.
Whether you're putting rounds downrange at the range or running drills, having that extra capacity in your mags means less time reloading and more time shooting. CMMG has been making reliable accessories for 5.7×28 platforms for years, and this extension follows that same no-nonsense design philosophy. It's the kind of upgrade that shows up and does its job without complications.
No, this extension is designed for the older generation FN Five-seveN 20-round magazines and won't fit the newer magazine models. Check your magazine's design before purchasing to make sure you have the right version. If you're unsure about your magazine generation, contact us and we can help you verify.
Installation takes only seconds. You remove the magazine floorplate, slide the extension into place, insert the chrome silicon spring, and reinstall the floorplate. Since it's fully reversible, you can remove it anytime without damaging your original factory magazine.
The chrome silicon spring is designed to resist corrosion and won't take a permanent set, even with regular use. This means it maintains its spring tension over time, so your mags stay reliable whether you're training at the range or storing them for extended periods.
The extension comes right off without any permanent modification to your magazine. Since it's completely reversible, your factory Five-seveN magazine returns to its original condition once you remove the kit.
| UPC | 852005002028 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 57AFD1E |
| Brand Fit | FN |
| Caliber/Gauge | 5.7 x 28 mm |
| Capacity | 10 |
| Color | Black |
| Model | |
| Model Fit | Five-seveN |
| Product Type | Magazine Extension |
| Shipping Weight | 0.14 |
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