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Holosun
Overview
The Holosun 407, 507K Adapter Plate for FN509 is a optic. Compare prices from multiple merchants and find the best deal.
Specifications
Available Merchants(4)
Prices checked
Stock Alert
Price and stock
The Holosun 407, 507K Adapter Plate for FN509 was out of stock everywhere we track for all of September 2026, and today none of the 4 retailers we track has it in stock right now. Listed prices start at $39.99 at Brownells for when it comes back.
Prices checked · refreshed daily across 37 retailers
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