Finally mounted a scope on my AR-10. The LaRue "M4" model one piece throw lever mount. This mount is solid, you could beat someone over the head with it and still keep zero! However, make sure you tighten the throw levers so the mount does not move, lest you chase your zero around the target like I did. Between 1-2 MOA at 100 yards was nice for an A4 model with Australian surplus ammo. www.laruetactical.com