FN’s MRD optics mounting system is the best there is. Their MRD-equipped pistols come with the all of the mounts and hardware needed to mount damn near any pistol red dot sight made. Now FN’s added MRD versions of their new FN 510 and FN 545 big more pistols (see our review HERE).
Here’s their press release . . .
FN America, LLC is pleased to announce the release of the striker-fired FN 510 MRD and 545 MRD optics-ready big bore pistols.