Holosun | 407/507K Adapter for FN509 | Type III Anodized

The Holosun 407/507K Adapter for FN 509 is a rugged, reliable mount designed to allow Holosun 407/507K-pattern optics to be installed on FN 509 pistols. CNC machined from 6061 aircraft aluminum and finished with a Type III Hard Anodized coating, the adapter is built for repeated use and exposure to the elements. Its construction is intended to provide a stable mounting surface under operational recoil and regular field use. Suitable uses for this adapter include duty or service carry and range or competition optics mounting.

Product Specifications

• The model is 407/507K Adapter.
• The manufacturer is Holosun.
• The product type is Adaptor.
• The subcategory is Mounting Accessories.
• The fit is specified as FN 509.
• The color is Black.
• The adapter is CNC machined from 6061 aircraft aluminum.
• The finish is Type III Hard Anodized.
• The design is described as a rugged and reliable mount for optics use.
• The unit is intended to withstand recoil and regular field use.
• The packaging UPC is 810047071112.

This adapter provides a straightforward, durable interface for mounting compatible Holosun optics to FN 509 pistols. Built from aircraft-grade aluminum with a protective Type III finish, it balances low weight with the durability needed for frequent use at the range or in duty applications. If you need a clean, OEM-style mounting solution for 407/507K-pattern optics on an FN 509, this adapter offers a no-nonsense option engineered for consistent performance.