This Springfield Armory adapter plate mounts a Holosun 509 or 509T red dot to the Agency Optic System (AOS) cut on the Springfield 1911 DS Prodigy slide. It is a direct-fit plate, so no machining or gunsmithing is required.

The AOS is Springfield's interchangeable plate system for the Prodigy. Instead of cutting the slide for one optic, you swap plates to match the red dot you run. This plate is the one for Holosun's 509-series closed-emitter sights.

Compatibility:

• Pistol: Springfield 1911 DS Prodigy with the AOS cut
• Optic: Holosun 509 / 509T

Includes:

• AOS mounting plate
• Mounting screws

Installation notes:

• Remove the existing plate or cover from the AOS cut and clean the mating surfaces.
• Seat the plate fully before installing the optic, then torque the screws evenly. Follow the torque values from Springfield and Holosun.
• A drop of medium-strength (blue) thread locker helps keep the screws from backing out under recoil.
• Re-zero your optic after installation, and re-check the screws after the first range session.

Confirm that your slide has the AOS cut and that your optic is a Holosun 509 or 509T before ordering. This plate is not for other footprints or non-Prodigy 1911 slides.