My 336 and my 39A both wear Lyman aperture sights. Both were factory drilled and tapped for the sights (rear left side of the action), so they were easy to mount. If your 336 is drilled and tapped for scope mounts, the Skinner's look like they'd work fine. I've never owned one, so I can't comment otherwise. As an aside, my father's Winchester 94 (which I inherited when he passed away) also wears Lyman aperture sights and a Redfield Sourdough front sight blade.
