The best aperature sight on a Handi is the Williams WGRS peep. Mount it to the rear where the scope mount rail goes. This places the rear sight approx. where a receiver sight would be on a lever rifle. I just mounted a Krag sight at this location on my 44/handi.
I shot it last Saturday with my lead loads to see where the POI would fall. I was truely blown away with the sight picture, windage & elevation was dead-on at 25 yards. The front sight is the standard iron that came with the piece. I'll take it out again with my 240 gr. jacketed full loads and file that front sight if it needs adjustment with the rear at the 100 yard mark on the rear sight. With luck it will need no tweeking.
With the elevation, by using the ladder sight of the Krag, I can go out to 1000 yards, if the bullet will travel that far.