WEIG-A-TINNY Smith Wesson K L and N Frame Scope Mount Smith Wesson scope mount WEIG-A-TINNY Remove the rear sight and install this versatile Weaver style base, scope mount in just minutes. (most revolvers mfg after 1992 are factory drilled and tapped for this scope mount) Fits K, L, N frame revolvers that come drilled and tapped from the factory. Top straps on older S&W revolvers can be easily drilled and tapped for this scope mount.