FN Five-seveN 5.7x28mm Magazine - 20 Round

Manufactured by FN America
SKU: 3866100030
MPN: 3866100030
Manufactured by FN America
3 Reviews

In Stock

Standard orders will ship out in 1 business days or less if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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Magazines considered High Capacity are controlled by the ATF and/or local jurisdictions are not available for purchase/shipment in all areas.



The FN Five-seveN factory magazine holds a total of 20 rounds of the high velocity 5.7x28 ammunition. The impressive 20 round capacity still fits flush into the grip of this handgun and is made from the same tough polymer. This factory 5.7x28 magazine is finished black and features steel springs and rear witness holes so you can see your round count. If you are looking to stock up on mags for this proprietary cartridge, you can’t go wrong with the reliability of factory FN mags.

  • Fits FN Five-seveN handguns
  • 20 round 5.7x28mm capacity
  • Polymer body with black finish
  • Flush fit baseplate
  • Low-friction polymer follower
  • Rear witness holes
FN America is a subsidiary of FN Herstal, a global company with a proud, long-standing heritage. They are committed to providing highest quality, dependable, innovative firearms. With an over 127-year history, Fabrique Nationale stands at the cutting-edge of commercial, law enforcement, and military weapons. Every one of FN America’s firearms are hand tested before leaving the factory to ensure reliability and make sure that the product you receive will work when you need it to.
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BrandFN America
Caliber Gauge5.7X28mm
Magazine Capacity20
PlatformFN Magazines
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

3 reviews

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FN five seven magazines

by -

FN brand mags. What else to say! They work great in my five seven pistol and in my CMMG banshee. Great magazines.

Perfect function, Original OEM


Ran four of these through my new FN FSN 5.7x28mm. No issues whatsoever. Get the original!

FN 5.7 mags

by -

FN Five Seven factory mags arrived quickly, not much else needs to be said!