Pearce Grip PG-42+1 extension installed on a factory Glock 42 magazine. This combination adds 3/4" in grip length and one round of capacity making the total capacity 7 rounds. The included magazine has been modified from its original factory condition with the installation of components manufactured by Pearce Grip Inc. As such the magazine manufacturer has no express warranty of the fit and function of the Pearce Grip components. All original magazine components that are not used for the installation will also be included in the packaging.