Thanks but is Gehmann not just the maker of the insert?
I'm looking for the maker of the sight.
Thanks,
JJ
It's a 22 mm Porter ladder sight.
Did you go with the 30mm Rightsight? I did use the 4.0-6.0 iris but found I couldn't get enough white around the target at 500 yards using the .5 lens in the front. The lowest setting I could use at long range was 5.5. I bought a new iris last summer that goes from 5.5 -7.5, any bigger and I might as well not use the iris at all and just shoot the tunnel.