Springfield Armory Prodigy AOS Plate Kit for Holosun 509 – 1911 DS

Description

Adding a red dot to your Springfield 1911 DS Prodigy is straightforward when you start with the correct AOS plate, and this is the one built specifically for the Holosun 509 family. Developed in collaboration with Agency Arms, the Agency Optic System uses dedicated steel plates that lock your optic to the slide at the proper height, so your dot lands where your eye naturally looks. This particular plate, referenced as the A19B, is cut to accept the Holosun 509T footprint.

What the Prodigy 509 AOS Plate Brings to Your Slide

Machined from billet steel with a black finish, this plate is built to hold zero and take a beating. The height is dialed in to give you an intuitive sight picture and fast target acquisition, which is exactly what you want when you're running a dot on a competition or range gun. It ships as a complete kit with the mounting screws needed to attach it to the 1911 DS slide, so there's no scrounging for hardware once it lands on your bench.

Why the Integral Rear Sight Matters

One of the smarter touches on this AOS kit is the serrated black notch rear sight installed on the rear dovetail. That means you keep usable iron sights and co-witness capability with the 509 mounted, so if your optic ever goes dark you still have a way to aim. It's a clean setup that doesn't force you to choose between glass and irons.

Fitment and Optic Compatibility for the 1911 DS

This plate is designed exclusively for the Springfield 1911 DS platform and is compatible with both the 4.25-inch and 3.5-inch Prodigy variants. Keep in mind the 509 plate is optic-specific, so if you're running a 407C, 507C, 508T, or a K-series micro like the 407K or 507K, you'll want the matching AOS plate for that footprint instead. Match the plate to your Holosun 509 and you're set up for a solid, repeatable mount.