If it's like mine, you probably will have to raise the front blade, especially if you add the height of the barrel contour and the weaver mount to the base of the rear sight itself. I used a Bullseye rear sight on my .30-30 barrel. It fit the dovetail notch, but I had to use the short version and turn it around because of the barrel contour. It's a step adjust. Costs about $17, and I did not have to raise the front blade.