The HiViz comes with different screws, four or five I think, I put them on my TM1 and Beretta,then took them off. I have two of them laying around and would sell either one for $25 including shipping if you can wait a week or so. I think they are a bad idea. Why do you want to look at your front sight? gyrine
It makes you wonder how Harlen Campbell Jr. ever broke a target or became captain of the all american team when he says he would hate to enter a competition without a hi-viz site on his gun.....I guess he's just lucky.