Cmmg's 9mm, 10rd ar conversion magazines make it possible to shoot 9mm ammunition from your unmodified ar15 lower receiver when paired with a cmmg 9mm radial delayed blowback upper.It is a modified pmag that 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.Caliber: 9mm LugerCapacity: 10rdFinish: BlackModel: Conversion MagMaterial: MetalModel Fit: AR-15Capacity: 10