I never put my life on anything until I totally check it out first. How many of us are going to war with our guns anyway? The upper I just bought was totally disassembled before it was shot. Yes there were some loose screws (or looser than I would have liked) but it didn't take more than a twist or two to get everything back right. You take any large Co. that puts out that much volume & their quality will be hit or miss.BCA used to be Moore Machine Co. (MMC). They had a pretty bad reputation online anyways. They changed names and kept on producing... They had a run-in with ICE, with 30 employees rounded up just a year ago:
I can testify that their quality is (still) hit or miss.
The ethical questions around their business, and spotty quality are legit concerns. They are also very inexpensive, and have stood behind their product when it had issues for me. It's a mixed bag. I would buy and shoot them again, and I would recommend them with some necessary disclosures (e.g. you might have an elevated risk of issues requiring the upper be sent back). I'm 100% fine with BCA for hunting, plinking, or playing with oddball calibers. I would still shy away from them if my life depended upon their rifle.