I hope someone knows this. On the cover of April's 2010 Special Weapons magazine they are featuring a LaRue OBR. The OBR has a Leupold MK4 and it shows a ring around the magnification ring that is a bolt on that makes it easier to grab and zoom in. I have been looking for where to get this ring but I can't seem to Google the correct verbiage to get the device. Does anyone know what it is or where I can get it? You can see it in this picture.
http://www.tactical-life.com/online/special-weapons/larue-optimized-battle-rifle-762mm/
http://www.tactical-life.com/online/special-weapons/larue-optimized-battle-rifle-762mm/