I would agree entirely. I have had a few Cond MkIV's over the years & all of the charger bridges differ a little from those as fitted as standard on MkIII's in that they project down a little lower than the ejector screw, being recessed a little to clear it. You can see in the photo that the charger bridge on the shown rifle finishes above the level of the ejector, typical of a factory produced MkIII.