Yep.
Those "round tops" that were drilled and tapped were spaced to accept bases that were made to fit Remington actions - if I remember correctly.
A lot of those "round tops" that were drilled and tapped also had factory sites.
I have a 200th year "round top" that was drilled and tapped - without sites. According to Ruger, that rifle was never produced. It did leave the factory that way. Original owner still had the box. Mine also has the tang safety - right where it should be.
GB
