This GEN3 Glock Extended Magazine Release, also known as Glock EMR, is designed for all full-frame 9mm Glocks (17-39). It is CNC machined from aerospace-grade aluminum and seamlessly blends with the ergonomics and style of your Glock handgun. Along with functioning exactly like an OEM release, the profile of this Glock Extended Mag Release is slightly raised with chamfered edges, making it easier to eject your Glock magazine quickly and smoothly. RSR -