Report of Kalinka's co-witness Aimpoint mount breaking

In January, Kalinka Optics http://www.kalinkaoptics.com/ released a special run of side rail mounts that would allow co-witness with a Aimpoint M3 style optic. I have one of these mounts and also a similar mount they offered that usually is for the PK23 which I and others modified to work better as a co-witness mount (see this thread: http://warriortalk.com/showthread.php?t=60011).

Apparently one of these broke already in it's thin point where the ring attaches. http://www.ar15.com/forums/topic.html?b=4&f=56&t=124897&page=5 That's too bad if it is a problem with all of these mounts since they are my favorite right now. I'll fall back to the BP-02 if these continue to break.