How it is:
1. Barrel = YES, Green Mountain
2. Receiver = YES, Nodak,Firingline, ect...
3. Front and Rear Trunions = Rears are sometimes availible, but not ever fronts. Turbothis/mygunsnorthwest, still forign counted if the front isn't US made though
4. Bolt Carrier = NO
5. Bolt = NO
6...