Brand: Pearce Grip. Type: Grip Extension. Compatible with Glock Gen 4&5 9mm/40SW Models: 17, 19, 19MOS, 22, 23, 34, 35. Does not fit: 10 Round Magazines. MPN: PG-19G5. These Grip Extensions replace the magazine base plate providing better comfort and control by adding approximately 1/2 inch of gripping surface. They do not alter the capacity of the magazine. An optional filler piece is provided for Gen 5 models with the semi-circular cut-out in the lower front area of the grip body. This optional filler piece allows for installation of the PG-19G5 on all Mid and Full Size Generation 4&5 models. This product will only work on magazines equipped with double notches for the ambi magazine release (Gen 4&5 magazines) and that have a capacity greater than 10 rounds. Please note: Includes 1 microfiber cloth per order, regardless of quantity purchased. Microfiber cloth may be tan, gray, or black.