Well, I put the slide in the vise, got a brass punch, and it just mushroomed. I tried a steel and it still didn't budge. I put Kroil on it before even trying. I then made up a jig by taking a 3/16 bold and grinding it into a half moon shape like a sight pusher. I mesured down on the vise jaws to where I want it to push. (the fat part of the slide should be under the jaws, or it will just rock). I welded the bolt on a piece of angle iron so I wont have to hold the bolt, the top of the angle iron sits on top of the vise jaw. I put a piece of wood on the side of the slide so the sight will push out without hitting the jaw. The rear sight pushed out with lots of pressure, its an 8" vise that weights 135 pounds. The front didn't budge, it just bent the bolt. So I got out the Metabo with the waffer wheel and cut the sight out.
The new sights went in without a problem, it has a section of the dovetail that has a hex bolt to lock it in.
I did call Springfield and they offered to get the sights out for free.