The CMMG Magazine Extension Kit increases the capacity of FN Five-seveN pistol magazines by ten rounds. It is intended for use with FN Five-seveN 20-round magazines and is not compatible with the newest magazines. Installation takes only seconds, does not permanently alter the factory magazine, and the kit uses a chrome silicon spring that resists salt water and will not take a set.
Key Specifications
- Increases magazine capacity by 10 rounds.
- Designed to fit FN Five-seveN 20-round factory magazines.
- Caliber compatibility: 5.7 x 28 mm.
- Product type: Magazine Extension.
- Finish: Black.
- Color: Black.
- Compatibility note: Not compatible with the newest magazines.
- Contains a chrome silicon spring that resists salt water and will not take a set.
- Installation time: Seconds, with no permanent modification to the factory magazine.
Practical and straightforward, this extension kit is a simple upgrade for range use, competition, or general high-capacity training. Its quick installation and corrosion-resistant spring deliver dependable performance without modifying the original magazine, making it a useful accessory for owners of compatible FN Five-seveN magazines.
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