Agency Optic System (AOS) 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. Each AOS plate ships with screws to mount the plate to a 1911 DS handgun. A13B Plate HEX Dragonfly Vortex Viper Burris FastFire 2 Burris FastFire 4 Crimson Trace CT RAD Pro