The SLR Rifleworks Magazine Plate is compatible with Glock 9mm and 40 S&W magazines. FeaturesBillet AluminumBlack Hardcoat AnodizedExtended Floorplate makes pulling mags out easier with magwells installedFits Gen 3, 4 and 5 GlockFits all 9mm & .40 Cal magazinesAlso works with ETS magazines DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.