These manufacturers are:
01. Ohio Ordnance Works
02. Firing Line
03. Red Jacket Firearms
04. vector Arms
05. Arsenal USA
06. Krebs Custom, Inc.
07. Ohio Rapid Fire
08. Piece of History Firearms LLC
09. Marshall Arms
10. In Range
Inter Ordnance, IO Inc. also. They used to have quality problems. Don’t know if they’ve been corrected but the bottom line is, as you pointed out, US made AKs are not a new thing.