This Magazine Well Insert Assembly is designed to work exclusively with the Ruger® 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.