YHM QDS Front Sight

What’s the verdict on quality and function of these. I’m considering one.

I have one on my M&P 15 and I have no problems with it at all. Has held it’s zero, not shifted at all, and been easy to adjust ext. I like how low profile it is too when it is folded down. No complaints here.

jmp45, dosen’t seem to be happy with his.
https://www.m4carbine.net/showthread.php?t=38203
https://www.m4carbine.net/showthread.php?t=38118

Those are different sites then the ones the OP asked about. But point taken. I’m not defending YHM, just saying that I have had no issues with mine at this point, and I actually much prefer the profile of the QD front site when folded to others I have seen. The second they fail (if they ever do) I will be sure to let everyone know.