Fell apart after 60 rounds - NcSTAR Top Mounted Deployable Rear Sight

This is a very cheap product. The first thing that I noticed was that the flip up part of the sight was very loose when in the upright position. In fact, it was so loose it was pretty much pointless to adjust my zero left to right. After shooting 100 rounds through my AR/15 the whole sight fell apart. I was looking on the ground for ten minutes just trying to retrieve the parts. Now I have to stop firing to push the pin back in so the whole thing doesn't fall apart. I am very disappointed and wouldn't recommend this to anybody