The Walther Holosun 509T Optics Gen 2 Mounting Plate is a genuine Walther factory mounting plate designed to provide a solid mounting platform and maximum zero retention for your handgun-mounted micro red dot sight. Compatible with factory PDP slides with a 2.0 optic plate cut, this mounting plate features heavy-duty steel construction with a matte black nitride finish for maximum strength and long-lasting performance under the most demanding conditions. Plus, the precision-machined footprint pattern provides a tight and precise fit for improved rigidity and enhanced field performance even under heavy and sustained recoil.