i want to change the sights on my Ruger 458 LOTT. It currently has the one solid and two fold up express sights. I want to get rid of the express and put in preferably an open sight like a williams (williams dont make a sight for the LOTT) as i want to zero the rifle at 10-15m and thats where it will stay. Any info would be helpful. I have friends in the states now who can bring the sights back so want to jump around.