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CMMG Magazine 5.7 40 Round 3 Pack


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  • Pack of 3
  • 5.7x28mm caliber
  • 40 round magazine
  • Each magazine weighs 8 oz.
UPC: 816422028979 SKU: AIT54AFCD2-003 Categories: , Brand:

The CMMG Magazine 5.7x28 mm offers the capability to modify your existing AR-15 lower receiver so that it can safely handle this new cartridge without compromising firepower or reliability! If you have ever wanted to fire 5.7x28mm ammo and didn’t want to purchase a gun designed to handle the round this is your opportunity to cycle it through your existing AR lower.

  • 40 rounds in each magazine, you'll be able to fire off fewer reloads than before
  • 3 Pack means more shooting without having to reload as much

In order to correctly feed 5.7x28mm ammo through your AR-15 lower:

  1. CMMG 5.7x28mm Radial Delayed Blowback complete upper receiver to your existing lower.
  2. Then insert the CMMG 5.7 AR Conversion Magazine to safely feed 5.7x28mm ammo through your AR-15.
CMMG recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration.

CMMG Magazine 5.7 x 28mm Specifications

UPC: 816422028979
Manufacturer: CMMG
Manufacturer Part #: 54AFCD2
Type: Magazine
Model: 5.7 Conversion
Caliber: 5.7X28MM
Capacity: 40Rd
Color: Black
Fit: AR Rifles

The AR conversion magazine maintains the utility of your rifle by retaining the last bolt hold open functionality, allowing faster reloads. The CMMG 5.7 AR Magazine offers an innovative way to fire the distinct FN designed 5.7x28mm cartridge.

This FN specific ammunition was initially created for the FN P90 and FN Five-seven pistol but a CMMG conversion magazine offers another use. You can safely and reliable fire this round through your AR-15 upper receiver.

CMMG products over $49 qualify for free shipping. If you have any questions feel free to contact us so that we can lend you our expertise in choosing the right CMMG product for you!

Export Notice

The CMMG Magazine 5.7 is controlled for export by the Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements.

As part of the express consideration provided for receipt of AIT Arms goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by AIT Arms in violation of U.S. law is prohibited.

Customers acquiring controlled goods, technical data and/or services from AIT Arms shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws.  (See AIT Arms Shipping Policy for more information).

Safety Notice

Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. AIT Arms shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.

PLEASE NOTE: Certain U.S. jurisdictions restrict firearm magazines sales. AIT Arms will not process sales/shipments prohibited by law. A list of states and municipalities restricting firearm magazine sales is available here.

WARNING! Cancer and reproductive harm. Please visit to learn more.

Additional information

Weight 24 oz
Dimensions 14 × 10 × 2 in


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