Seems I may be a little late with this reply.......I discovered , thru a GB member ,the " one ragged hole" sight. With a fiber optic up front and the ORH on the rear......its really fast to aquire the target and sight picture. I might add " for hunting "..........I don't care for it for punching holes. You MUST concentrate entirely on the front sight when looking through the appature........your eye will automaticly center the front sight if you do so. In a hunting situation I have no trouble doing so. They're quality sights. You get two appatures ( big and small ) and easy to follow instructions for installation. And they're not that expensive....and not permenant, if ya don't like it , put your old notch back on. Can't remember the web site......just google " One Ragged Hole " , that will get ya there. regards , Irold