The Strike Industries Mag Sleeve for Glock 19 all generations is designed to provide a more aesthetically pleasing look and smoother magazine reloading through a slow drag/no snag design. The Mag Sleeve serves to increase cross-platform ergonomics when utilizing a Glock 17 magazine on the more compact Glock 19 model. The flared sides of the Mag Sleeve also increase manual magazine reload proficiency ensuring that you gain positive control of the magazine when executing administrative/ tactical reloads.