So far it is steady - Leupold Mark 2 IMS AR Rifle Scope Rings Mount

After looking through a number of mounts, I decided on this one over the Vortex because of two factors. One was because it was made in USA, the other was receiving bad reviews and this mount received favorable reviews. I have it mounted on a new AR-15 and it has been steady. I only have about 100 rounds through the rifle since setting the mount and scope. I like the fact it only has a few screws to tighten and that it is not bulky. I think mounts should be sturdy but not overbearing on a gun or scope.