Strike Industries EMPALG17Red Extended Mag Plate Fits Glock G17 Fits Glock G22 Red 6061 T-6 Aluminum The Strike Industries Aluminum Extended Magazine Plate For Glock G17 (9mm) / G22 (.40 Cal) Was Designed To Provide Smoother Magazine Reloading Through a Slow Drag/No Snag Design While maintaining Maximum Magazine Capacity. Machined From 6061-T6 Aluminum, This Extended Magazine Plate adds Plus 5 9mm Or Plus 4 .40 Cal rounds To Compatible OEM Double Stack Glock magazines. Included Is An Aluminum Plate Which adds Extra Locking Security. Model: Extended Mag Plate Material: 6061 T-6 Aluminum