I'm not int the market right now myself, but he was talking about a NiB BCG for $175 and I know that you can get a Toolcraft right now for about $100 after shipping:
https://www.righttobear.com/Toolcraft-Nickel-Boron-158-Bolt-Carrier-Group-MP-p/tooauto-010-c158.htm
Personally I'm not buying anything until Black Friday. I think it's going to be awesome this year.
So except for being Toolcraft this one has the correct materials right?