CMMG’s 5.7 AR Conversion Magazine holds 40 rounds of 5.7x28mm and fits in any standard AR15 lower receiver. To use, simply attach a CMMG 5.7x28mm Radial Delayed Blowback complete upper receiver to an existing AR15 lower. Then, insert CMMG’s 5.7 AR Conversion Magazine to safely feed 5.7x28mm ammunition. CMMG recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration. The 5.7 AR Conversion Magazine also retains last round bolt hold-open functionality, allowing for faster reloads.
CMMG will ship your firearm to the licensed dealer (FFL Holder) of your choice.
We will contact you within a few business days to complete the firearm transaction and determine which FFL you would like us to ship your CMMG to.
At checkout, when you select your shipping address, just select “same as billing”.
We ship firearms to all states except CA and NY.
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