CMMG: Magazine, Mk4/AR15 Conversion, Gen II, 5.7x28MM - 32 Round
CMMG®’s 9 AR Conversion makes it possible to shoot 9mm ammunition from your unmodified AR15 lower receiver when paired with a CMMG® 9mm Radial Delayed Blowback upper.
CMMG®’s 9 AR Conversion is inserted into a Gen 2 or Gen 3 Magpul® PMAG®. It seats into your AR15 mag-well and holds up to 30 rounds of 9mm ammunition. Its unique design allows it to feed any CMMG® 9mm Radial Delayed Blowback upper receiver while maintaining last round bolt hold-open functionality.