Here is a fine mount for the Smith revolvers. Further, it doesn't cost an arm and a leg. Available in both blued and silver:

Smith Wesson scope mount KLN frame

These mount bases use the sight cut out as a recoil lug and you should have NO fears of problems. I've got a bunch of revolvers with scopes and Red Dot sights on them, so have a bit of experience in this area.

FWIW
Dale53