CMMG 5.7 AR Conversion AR-15 Magazine - 10 Round - 3 Pack

Manufactured by CMMG
Manufactured by CMMG
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The CMMG 5.7 AR Conversion Magazine offers the capability to modify your existing AR-15 lower to safely handle the 5.7x28mm cartridge. This conversion magazine holds 10 rounds. In order to correctly feed 5.7x28mm ammo through your AR-15 lower, attach a CMMG 5.7x28mm Radial Delayed Blowback complete upper receiver to your existing lower. Then insert the CMMG 5.7 AR Conversion Magazine to safely feed 5.7x28mm ammo through your AR-15. The manufacturer recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration. 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 Conversion 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. 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.

  • 5.7x28mm caliber
  • 10 round magazine
  • Each magazine weighs 8 oz.
  • Pack of 3

A leading manufacturer of AR-15 rifles, kits, and accessories, CMMG Inc. was established in 2002. Constantly pushing the edge, CMMG strives to develop and improve bringing you a product lineup that is second to none.
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Caliber Gauge5.7X28mm
Magazine Capacity10
PlatformAR-15 Magazines
Weight8 oz.
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

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