Glock MOS Cover Plate 02 45 ACP G20 Gen 5, G21 Gen 5

This Glock MOS Cover Plate smooths out the back portion of the slide when the MOS is not being used. This replacement part is a factory original from Glock. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantees excellent fit and reliable operation. Some parts may need to be installed by a qualified gunsmith.