OK so here's where i get both barrels () sorry guys but as you get old enuf your eyes are going to go to hell too and even on a double you end up wanting a scope. I sut one on my merkel 470. The rib on the merkel is the same width as a ruger 77, so i machined dovetails into the rib and used a set of leupold detachable rings. Now not only did i do that, but I mounted a 1-5 bushnell 3200 on it. I know I didn't say leupold, but it does have the firefly reticule. Now for the horrendus thing. Everything works fine. It didn't effect regulation, didn't blow up or any bad things, what it did do was let me put those ugly crosshairs on the elephants forehead in the right spot, instead of just seeing things as a blur.