Fits the Glock 427-round capacity but sits flush like a standard 6-round OEM Glock 42 magCompatible with Glock and aftermarket floorplatesEasy disassembly with our specially designed baseplateErgonomically designed floorplate makes it easy to grab from mag pouchesADVANCED POLYMER BENEFITSExtreme Impact Resistance—won't crack or break when droppedVery resistant to harsh chemicalsSuperior heat, cold and UV resistance—won’t become brittle over time even when exposed to harsh environments or extreme coldTranslucent body—allowing you to see your ammo count and typeCreep resistant—the feed lips and body won't spread when being stored long term even when fully loaded