On your advice I asked ChatGPT , this was the output:

KAK blems are usually considered a pretty good gamble if you care more about function than perfect cosmetics.
From what I’ve seen, their “blem” stuff often has:
Tooling marks
Uneven finish
Small scratches/dings
Slightly rough chrome or phosphate appearance
Cosmetic inconsistencies
But generally still functions fine. A lot of Reddit users say the actual blem is hard to even find, while others report rougher-than-expected finish quality.
The bigger takeaway with KAK is:
Their QC on cosmetics can be inconsistent
Their customer service reputation is excellent
There are multiple examples of KAK directly reaching out and replacing questionable carriers very quickly when users had concerns.
For a BCG specifically, I’d personally view their blems like this:
Phosphate blem → easiest “send it” purchase
Chrome blem → depends how picky you are; chrome highlights imperfections more
NP3 blem → probably the one I’d be most cautious about cosmetically because coating quality is part of the appeal
K-SPEC blem → usually still worth considering if discounted enough
If you’re the kind of person who gets annoyed seeing machining marks on your EDC gear or likes clean finishes on titanium stuff, you may notice KAK blems more than some people would. But functionally, most reports are positive.