Have your barrel drilled and tapped for the std. type Williams sights, 2 holes for the rear. one for the front.
But if you want the option of using your scope on it when thus equiped you will have to remove/reinstall the scope rail (yep, only those three little screws, unless you also bedded the rail on) as required.
Then, when another barrel shows up, likely for scope rail only, get it and you are good to go.