The Holosun 407/507K Adapter for FN 509 is a rugged and reliable mount, perfect for use with law enforcement, the military, and the everyday shooter. CNC machined with 6061 aircraft aluminum with a Type III Hard Anodized Finish, this mount is designed to withstand even the hardest-hitting recoil as well as rough use and abuse in virtually any tactical environment.
Accessories, Optic Adapter Plates
Holosun 407/507K Adapter, Fits FN 509
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407/507K Adapter · Black · Fits FN 509
Out of stock
| Mount Type | Holosun K / RMSc Footprint |
|---|---|
| Platform | Pistol |
| Compatibility | Fits FN 509 |
| Color | Black |
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- ✔ Authorized dealer — factory-new, full manufacturer warranty
- ✔ Ships from California in 1–2 business days · free shipping over $199
- ✔ 30-day returns · secure checkout
- ✔ Bulk, LE & Gov pricing available — request a quote
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