After you get things tightened up, consider getting rid of the rear sight. Unfortunately the receivers are no longer drilled and tapped for receiver sights. The last couple of Marlins I got I had to have drilled and tapped to mount Williams Foolproof rear sights. I also put on slightly higher square post front sights like the Brockman and XSSystems. I find that a much better setup than a brass bead and open rear sight.