Fits Glock models 17,18,19,22,23,24,25,31,32,34,35,37,38 - Full Metal Lined Magazines Only * Provides comfort by increasing the length of the grip 1/2 inch over stock dimensions, yet blends with the contours and texture of the handgun giving a factory appearance * Made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 350 F * Provides magazine identification via Mag-Track? for those that rotate magazine usage * Provides an easier means of manually extracting the magazines.