So I managed to get the sytong on the air rifle.
It's only a 3-9 with no parallax so I've had to compromise a little bit on close targets. Come 20yds it's clear enough and improves even further out. Under 20yds the image is blurred but I still shot two at 10yds.
Shot 5 rats tonight and I'm pleased with the results. Nice and quiet, just centered, lights out.