Similar in concept to the Magpul Ranger Plate? for AR15/M16 magazines, the SpeedPlate allows for rapid magazine extraction and positive handling. Protects the base of magazine from impact. The SpeedPlate replaces the floorplate on all factory Fully Metal Lined (FML) GLOCK 9mm and .40S&W double-stack pistol magazines. *NOTE: SpeedPlate is NOT compatible with the Magpul® GL9 series of PMAGs®. Made in U.S.A.