The Pearce PG-XD provides control and comfort without sacrificing concealability. It blends with the contours and texture of the handgun to maintain a factory appearance. They are made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 350 F. These units replace the magazine base plate. They do not alter the capacity of the magazine and provide better comfort by adding approximately 5/8 inch of gripping surface..