Can a scope be mounted on a Winchester 9410?

Sure it can. The 9410, at least the "Traditional" model I'm familiar with, has the same drilled and tapped receiver as other model '94 AEs. Leupold and Burris make bases that fit, and all you need do is select a scope and ring combination that allows the hammer to clear the rear objective of the scope. You'll also want to install the little hammer extension (use a bit of Loctite) to make it easier to manipulate the hammer while the scope is in place.