Most people prefer a scope mount made out of steel. These ones are aluminum. The bolt hole to attach to the side of the receiver is slightly off as well. You may need to shim the back of the mount where it attaches to the stripper clip guide to bring it more inline. Aside from all that, I closely examined mine and determined what it needed and now it is locked on solid, doesn't move at all and is very much inline.
I also needed to file down a couple of corners to keep away from the ejecting brass. A USGI ejector spring will work wonders to keep the brass from bouncing around between the receiver and scope mount.