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sorry the adapter plates are sold separately https://fnestore.com/509-mrd-kit

Hi Christopher and welcome. Comes with FN Low Profile Optics Mounting System with plate adapters for direct mounting of more than 10 optics. Details on FN's website here: https://fnamerica.com/products/pistols/fn-509-compact-mrd-comp/ --------- Cheers and stay safe!