Broke after 100 rounds - NcStar Ar15 Qr Weaver Mount/ Cantilever Scope Mount Rear Ring 30mm

The mount broke and detached from the rail after 100 rounds. I could still get it to work by tightening the bolt down so much that it rendered the quick detach completely useless. Even then it still could not hold a zero at 100 yards and shifted the zero by 3 or 4 inches every 50 rounds or so.

I definitely do not recommend purchasing this mount.