Understanding FN 509C Magazine Options and Compatibility

The FN 509C (Compact) is a versatile 9mm striker-fired pistol designed for concealed carry without sacrificing performance. A key aspect of its adaptability lies in its magazine options, which allow users to tailor capacity and grip length to their preferences. Understanding the available FN 509C magazine choices and their compatibility is essential for optimizing your shooting experience.​


Standard Magazine Options

The FN 509C comes equipped with:​

  • 12-Round Magazine: Flush-fitting, ideal for maximum concealability.​
  • 15-Round Magazine: Slightly extended, offering additional capacity and an enhanced grip surface.​

These magazines are designed to maintain the pistol’s compact profile while providing reliable feeding and performance. ​


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Extended Magazine Compatibility

For users seeking higher capacity, the FN 509C is compatible with larger FN 509 magazines, including:​

  • 17-Round Magazine: Offers increased ammunition capacity for extended shooting sessions.​
  • 24-Round Magazine: Provides maximum capacity, suitable for range use or home defense scenarios.​

These extended magazines enhance the versatility of the FN 509C, allowing it to function effectively in various roles beyond concealed carry. ​


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Magazine Compatibility with Other FN Models

It’s important to note that while FN 509 magazines are compatible with FNS series pistols (with a baseplate swap), the reverse is not always true. FNS magazines may not fully seat in the FN 509 series without modification. ​


Frequently Asked Questions

  1. Can I use FN 509 full-size magazines in my FN 509C?
    • Yes, FN 509 full-size magazines (17 and 24 rounds) are compatible with the FN 509C, offering increased capacity. ​
  2. Do extended magazines affect concealability?
    • Extended magazines increase grip length, which may impact concealability. Users should balance capacity needs with concealment requirements.​
  3. Are aftermarket magazines reliable for the FN 509C?
    • While some aftermarket magazines exist, using FN factory magazines ensures optimal reliability and performance.​
  4. Where can I purchase FN 509C magazines?
    • FN 509C magazines are available through authorized dealers, online retailers, and directly from FN America’s website.​
  5. How can I maintain my FN 509C magazines?
    • Regular cleaning and inspection of magazines are recommended to ensure consistent performance and longevity.​