The FP-GR showed up today so I hurriedly put it on the Henry. It fits great and has a pretty wide range of adjustment. The sight is a bit wide on the skinny receiver, I'm sure Williams figured it would be more likely to go on a bolt action. Anyhow, the click adjustments are much easier than the friction adjustments of the WGRS. I took it out to 50 yards and was minute of squirrel, which is the best I can do with my eyesight.