Re: Mystery Rings
These are Leupold Ultra rings. Basically they are Mark 4 prototypes. The difference is that the 1st generation Mark 4 (Ultra rings) have a flat on thier top whereas the current Mark 4 rings have a circle on thier top. These are not to be confused with the Ultra prototype rings...they were fully machined from stock. The Ultra and Mark4 production rings are cast and then machined.