Introducing the Ruger PC Carbine Magazine Well Insert. This Magazine Well Insert Assembly is designed to work exclusively with the Ruger PC Carbine and PC Charger. It accepts all Ruger American Pistol 9mm magazines. The flush-fit design is made from rugged, glass-filled polymer material for strength and durability. Quick and easy installation; instructions included with product. The 5/32" hex wrench included with the firearm is required for installation. Genuine Ruger Factory Accessory.