This Magazine Well Insert Assembly is designed to work exclusively with the RugerĀ® PC Carbine?. It accepts all Glock-style 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 PC Carbine? is required for installation. Made in the USA. Genuine Ruger Factory Accessory.