Whether they are good or not depends on your eyes. I’ve had central serous retinopathy in my dominate eye that has severely affected my ability to clearly see a partridge style sight. Once they eyesight has failed, what are you going to do? Keep the more precise sights that you can’t see anymore, or go to what you can?
Exactly..
I've got a couple with 'em and many without. Depends on the gun and when/where it's used.
