From all I read so far and based my experience with an 1885 and that brand scope (not together), this is what I would do. First I would find a tang sight. With a tang sight, there is no need for a rear leaf. On the other hand getting any kind of a neat looking scope mounted on a Miruko 1885 is tough. The typical bases look like crap to me. I would retain the 12x scope and mounts. That would be an ideal combination for hunting and target shooting. It is almost like my dream gun. Tang aperture and a classic scope. Sweet.