Holosun 509 Adapter For Hs507c Footprint - 509PLT-507C. Specifications for Holosun 509 Adapter For Hs507c Footprint: Manufacturer: Holosun Red Dot Sights-Footprint: Holosun 509T Optic Cut: Holosun 507C Condition: New Package Contents: Holosun 509...