I have had issues with the ring pivoting about the center dowel on the lower portion of of the ring with my cantilever mount. Despite using the upper limit of the torque settings and blue loctite, my ring would not hold after a few mags. ADM graciously agreed to replace my mount with remarkable speed. The new mount I received exhibited markedly less play between the neck/base and the ring, however, the mount eventually began to lose zero. I "shimmed" the ring in place with wicking loctite, and it has been good to go since. I suppose I should contact them, but I honestly forgot about the issues after the loctite.

I have been very pleased with the clamping mechanism and use it to align the top rails when I install Lite rails or Troy Extreme rails.