A bud at work received his "FN" A3 upper and an A3 handle. Handle looks like it is machined from barstock. I guess that is better than the cast crap out there. Also the elevation index is not calibrated in meters, just 5, 10, 15, etc.
Sorry to have taken so long to answer. The handles themselves are made by a military contractor. Those are forged, then we had them do an extra cut to clean up the rough area inside that everyone hates and complain about. We use is the Armalite/RRA NM elevation parts.