The C & H Precision Cross 1911-2011 Optics Plate is a heavy-duty steel adapter designed to mount the Holosun 509T enclosed-emitter optic onto 1911 and 2011 pistols utilizing the Cross footprint. This rugged plate is precision-machined from solid steel and finished with a black zinc coating to provide maximum durability and resistance to the high-impact recoil of duty and competition platforms. A standout feature is the integrated 10-8 Performance rear sight, which allows shooters to maintain a reliable backup iron sight picture after the factory rear sight is removed. Engineered with extremely tight tolerances, this plate ensures a secure, movement-free interface that holds zero under the most demanding conditions. Proudly made in the USA, it represents a premier mounting solution for professionals who prioritize structural integrity and co-witness functionality. C& H Precision Cross 1911-2011 Optics Plate Plate For Holosun 509T w/ 10-8 Rear Sight CR-509T-RSR-ST