Hi James,

I had a Williams aperture sight on the back of a 7600 chambered for .35 Whelen. It mounted in the predrilled holes intended for the rear scope mount. It was adjustable....but not target precision adjustable. But it worked fine for hunting use. It was also threaded which allowed you to adjust the size of the aperture, or as I did.....use a twilight peep!

The nicest thing of all....it wasn't terribly expensive and you should be able to find it at their web sight!

Hope that helps!

Dave