Both the ACRO and the Holosun 509T are enclosed-emitter footprints built for durability, but they mount differently. Here is the side-by-side.
| Spec | Aimpoint ACRO | Holosun 509T |
|---|---|---|
| What it stands for | Advanced Compact Reflex Optic | a Holosun model number — the “T” denotes its titanium housing |
| Emitter | Enclosed | Enclosed |
| Mounting pattern | Enclosed-emitter dovetail/interface, two screws | Enclosed-emitter footprint, adapter-plate based |
| Key dimensions | — | — |
| Optics we track | 3 listed | 2 listed |
Are the Aimpoint ACRO and Holosun 509T compatible?
Not cross-compatible. The Aimpoint ACRO and Holosun 509T are distinct footprints — an optic built for one won’t sit on a slide cut for the other without a dedicated adapter plate (where one exists). Buy the optic that matches your slide’s cut, or a plate that converts it.