I just got a Springfield Prodigy, and I took the Hex Dragonfly off of it and installed a Holosun 507C.  I figured I would ditch the old Buris Fastfire 2 I had on the FNP-45 Tactical for the Hex Dragonfly.

Does anybody know if the FNX-45 RDS mounting plates are interchangeable with the FNP-45?  The Hex Dragonfly mounts up directly to the slide, but there are no recoil lugs to make sure the Dragonfly doesn't walk.  If I could source an optics plate, that would be the best scenario.  If not, just more uga-duggas to keep it from moving?

Mounting plates are the same for the FNP and FNX.

Just be mindful you'll need 5-40 screws at least .400"+ long. I ran into this tonight. I forgot FN didn't do M3, M4, or even 6x32. The included 5-40 screws I removed from my BFF II were too short in my case to mount a Crimson Trace RAD Pro.