Springfield Armory 1911 DS Agency Optic System (AOS) Mounting Plate, A12B. Outfit your Springfield Armory 1911 DS pistol with an Agency Optic System (AOS) red dot mounting plate. This optic plate, A12B, is designed to accept many popular MRDs like the HEX Wasp, Holosun 407K-X2/507K-X2, Shield RMSc/SMSc/RMS2 and the Swampfox Sentinel. The steel plate has a black finish with a serrated black notch rear sight installed on the rear dovetail. The AOS mounting plate ships with mounting screws for installation onto the 1911 DS and is crafted to deliver reliable optic mounting performance. Developed in collaboration with Agency Arms the Prodigy employs AOS (Agency Optic System) plates designed exclusively for the 1911 DS. Machined from billet steel, each plate is designed specifically to deliver proper optic height for intuitive sight picture and instant target acquisition and features an integral rear sight. This AOS plate ships with screws to mount the plate to a 1911 DS handgun. Brand: Springfield Armory Caliber: 9mm Finish / Color: Black Firearm Type: Pistol Material: Steel Models Fit: Springfield 1911 DS