The Cross Armory CRG5SLRD includes a Glock Extended Slide Lock suitable for all Glock Gen1-5 models. While it has been engineered with a particular emphasis on Gen 5, this extended slide lock provides a snug fit for Gen 5 and its predecessors.*Important: Although the Cross Armory Slide Lock is primarily designed for Gen 5, it maintains excellent backward compatibility with all Gen 1-4 models.By providing ease in slide removal, it greatly enhances the cleaning and maintenance of your Glock. This asset is an essential add-on for any Glock aficionado seeking to upgrade their firearm. Rest assured, it will not cause any interference with your holster.