Holosun 407/507K Adapter for FN 509

Holosun 407/507K Adapter for FN 509 — adaptor that enables mounting Holosun 407/507K series optics to FN 509 pistols. It provides a secure interface so a compatible red dot can be installed on an FN 509 slide for duty, range, or everyday carry use.

This adapter is designed to solve the common fitment gap between Holosun’s 407/507K optic series and FN 509 pistols. CNC-machined construction and a hard-anodized finish deliver a durable mounting solution intended for regular use on a service or carry pistol where a compact optic is desired.

• Designed purpose: adapter to mount Holosun 407/507K optics to FN 509 pistols
• Material: CNC machined from 6061 aircraft aluminum
• Finish: Type III hard anodized, black color
• Product type: Adaptor (mounting accessory)
• Model: 407/507K Adapter — fits Holosun 407 and 507K series optics
• Fitment: specified for FN 509 pistols

Specifications & Construction

• Construction: CNC machined for precise fit and repeatability
• Material: 6061 aircraft aluminum for a balance of strength and weight
• Finish: Type III hard anodized for corrosion resistance and surface durability
• Color: Black

Compatibility & Intended Use

This adapter is explicitly for use with Holosun 407/507K series optics and FN 509 pistols. Typical setups include mounting a compact Holosun red dot as the primary pistol optic for range use, everyday carry, or duty applications where a slide-mounted optic is desired. The adapter is intended to interface the specified optic series to the FN 509 slide; it does not imply compatibility with other optic models or pistol platforms.

Note: This description uses only the provided product details (model, fit, material, and finish) and focuses on factual fitment and construction information.