The C & H Precision is a heavy-duty optic mounting adapter CNC-machined from mild steel and finished with a black MIL-SPEC Type III hard anodization. This plate is custom-engineered to seamlessly interface enclosed red dot optics with a crosscut machined 1911 or 2011 pistol slide. It provides direct compatibility with the Aimpoint ACRO series, C & H Duty, and C & H Duty XL optics. The integrated 10-8 Performance style rear sight delivers reliable backup iron sight functionality. This combination ensures a rugged, low-profile duty setup that holds a precise zero under heavy recoil. C& H Precision Cross 1911-2011 Optics Plate Plate For Aimpoint Acro w/ 10-8 Rear Sight CR-ACRO-XL-RSR-ST