This may or may not be useful here, but a few years back I bought 3 "KSC" M11 mags from him.
What I got in the box was three HFC mags loosely tapped together, so quite a bit scratched up.
Also, HFC mags are not to KSC's standard, and only contained 80% of the bbs of a KSC. They also don't have the little lock that prevents the follower from going up before you're done loading, so they are a bitch to full.
I should have left a negative after his apparent mislabeling and refusal to reimburse, maybe it would have helped get the attention of a mod faster.