I had an M&P 9 that I tried an MGW pusher on the front sight. Front sight didn't budge. I ended up using a brass punch with a 24 oz. hammer. I started with a smaller hammer and the sight wouldn't budge so I have to move up in weight. I guess what I am saying is, if you can't get it to move with a hammer and punch I am not sure a sight pusher is going to help you.