Fits the commonly used Docter/Noblex standard mounting footprint. (Does NOT fit Weaver Rails, This is inaccurate information provided by Amazon)
IMPORTANT: The included 3 screw sets are for the MOS Plate, optic to MOS plate, or optic to picatinny adapter ONLY.
IMPORTANT: For Doctor/Noblex mounting, use original optic mounting screws that were provided by your handgun manufacturer with your handgun to mount optic properly. Failure to do this will result in mounting issues. (Now fits FN509 handguns)