Holosun 509 Picatinny Mount Adapter 1/3 Co-Witness
Holosun Technologies
$59.99
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Holosun Technologies
Holosun 509 Picatinny Mount Adapter 1/3 Co-Witness
The Holosun 509 Adapter for Picatinny Mount (1/3 Co-Witness) is a precision-machined mounting solution that securely attaches your Holosun 509 series optic to any standard Picatinny or MIL-STD-1913 rail, delivering a reliable 1/3 lower co-witness sight picture for seamless use alongside your existing iron sights.
- Designed specifically for Holosun 509 series red dot optics
- Compatible with all standard Picatinny and MIL-STD-1913 rail systems
- 1/3 lower co-witness height aligns optic with standard iron sights
- Durable construction ensures a rock-solid, zero-retention mount
- Low-profile design maintains a streamlined, snag-free silhouette
- Easy installation with no permanent modifications required
Who This Is For
This adapter is ideal for AR-platform shooters, competition shooters, and tactical enthusiasts who want to run a Holosun 509 optic on a rifle, carbine, or any Picatinny-equipped firearm. It's perfect for those who prefer a 1/3 lower co-witness setup, allowing fast target acquisition with the dot while retaining a usable iron sight picture through the lower third of the optic window.
Specifications
| Brand | Holosun Technologies |
|---|---|
| Model | 509 Adapter for Picatinny Mount |
| Co-Witness Height | 1/3 Lower Co-Witness |
| Rail Compatibility | Picatinny / MIL-STD-1913 |
| Optic Compatibility | Holosun 509 Series |
| Material | Hardened Aluminum Alloy |
| Finish | Matte Black Anodized |
| Installation | Screws Included |
| Country of Origin | China |
Frequently Asked Questions
Will this adapter work with all Holosun 509 models?
This adapter is designed to fit the Holosun 509 series optics, including the HS509T and EPS series footprint-compatible models. Always verify your specific optic's footprint before purchasing, as some variants may use a different mounting pattern. When in doubt, consult Holosun's compatibility guide or contact Goodland Guns for assistance.
What is the difference between 1/3 lower co-witness and absolute co-witness?
A 1/3 lower co-witness positions your iron sights in the lower third of the optic's viewing window, giving you a less cluttered sight picture with the red dot more prominently centered. Absolute co-witness aligns iron sights directly through the middle of the optic. Most modern shooters prefer the 1/3 lower setup for faster, cleaner dot acquisition while still having backup irons available.
Can I use this mount on a shotgun or pistol rail?
This adapter is designed for standard Picatinny (MIL-STD-1913) rails, which are commonly found on AR-pattern rifles, carbines, and some shotguns equipped with rail systems. It is not intended for pistol slides or proprietary rail systems. As long as your firearm features a full-size Picatinny rail, this mount should be compatible.
