They also have what looks to be a phosphate finished BCG for $59 - https://maf-arms.com/product/ar15-fa-bcg/ They also have some blem ones for $42. If they were phosphate finished and half way decent, I would be fine with putting new screws in and sealing the gas key. I like tinkering AND saving money. So I sent an email asking them did they know the manufacture of them, if they were in fact phosphate coated. Did they know if they were chromed lined? Also did they have any idea of what steel the bolt and carrier was made of. There is no specs whatsoever on them. It does not even say if they for 223 or 7.62
I got a reply back......
Shane, those are a lot of questions. If their answer is important to you, then a $50 BCG isn’t right for you.
Also, we have no idea.
Thanks, and I love you.
-MAF Matt