I used an aperature sight on lever guns for years but have abandoned it recently. To me, a low powered scope is better in any situation. In low light a good 2.5x scope or a 1.5x5 scope will allow you to see the target much better in low light than the aperature sight or factory irons. That' s just pretty much the way it is. I have hunted trophy managed property the last two years and being able to count the antler points is a must.

I' d say get a good low powered fixed scope or a low powered variable scope.