This magazine well insert assembly flush-fit design is made from rugged glass-filled polymer material for strength and durability.It is compatible with the ruger pc carbine and accepts all ruger american pistol 9mm magazines.Included is a 5/32" hex wrench for installation.Caliber: 9mm LugerCapacity: Ruger PC CarbineFinish: BlackModel: Magazine Well Insert AssemblyMaterial: PolymerType: Magazine WellModel Fit: PC CarbineBrand Fit: Ruger