Does anyone know what rings these are? They came on a firearm I purchased and was wanting to know more about them. They have a "J" and an "A" on each ring which I assume is to line up so that the top half matches the bottom half. They have aluminum inserts like the Burris plastic inserts but they are not marked in any way and the Burris inserts will not fit. They look like quality bench rest rings and base but I couldn't get my scope to adjust far enough to zero it in so went with the Burris Signature rings and base.
