Aperture "peep" sights are very good, but it takes some getting used to if you're not familiar with them. Most people who have used front/rear open sights have a tendancy to want to see the aperture and center the front sight in it - WRONG! Simply look through the aperture and concentrate on the front sight and targey only. Forget the rear sight and you will shoot very accurately - try to align the front sight in the "hole" your looking through and you will have accuracy problems!