I was wondering what lens fit with the Radar, do the radarlock lens fit or are they too loose, what about m-frame?

Really wanting a Fire Polarized vented or Black iridium Polarized vented

Radarlock lenses don't fit into Radar frames (though the opposite is possible....Radar Path lenses could fit into Radarlock frames with a little bit of nudging...whether that pairing is good for long term durability and optics is yet to be determined).