Holosun 509 Mid Mount

Mounting plate for the Holosun® 509 optic to the Beretta® RDO 90 series slides. This Mid Mount will install the 509 optic (roughly) 1mm over the top of the slide. This enables the lowest mounting solution without the need to modify any internal parts of the slide. Options are available for both the 509T and 509ACSS option.