While the curve or sweep of the bolt handle appears the same as the FN's I've known I don't remember ever seeing an FN without a flat bottomed knob and I have never seen one without the low safety either so doesn't ring any bells for me. All the commercial FN's I ever bought had a single stage trigger and the rear of the follower was beveled so it didn't hold bolt open. That's why they were THE desirable acton when I was in gunsmith school, no modification or polishing was required at all. Also one other point was distinctive, the floorplate release button extended above the plate approx 1/8" and was not round but elliptical in shape as I remember. Sorry.