Can't tell in the pic and it's been a while since I sold my 92FS, Is the front sight part of the slide? If so You'd have to get the slide machined, meaning that you'd have to have the front sight ground off and either have a new sight staked on or get a dovetail cut in the slide.
Kind of like this:
BTW, beautiful piece. I've always loved the way Berettas look in stainless.