Lyman 57sml rear sight 3090114 - Lyman 57SML and 57GPR Receiver Sights

This sight helped tighten my shot group tremendously, you can't beat the simplicity and accuracy. Since it sits on the tang, you do have to mind where you place the thumb on your shooting hand. Colorado and some other states do not allow optics on muzzle loaders while hunting, but this sight is the next best thing to an optic. I would also recommend painting a high visibility dot on your front sight to make acquisition easier.
Pros: Easy to mount and set up
Cons: Takes some getting used to

This review was written in the old system and had content requirements that are different than reviews written today.