So after spending an additional $50 on a new front night sight. I just finished installing it today; the correct way. I originally used a brass punch and hammer but that broke my night sight lamp inside. I banged the hell out of the sight to get it off. Needless to say Trijicon wouldn't replace the lamp or sight due to my abuse. This time around I bought a Brownells SW M&P sight pusher ($145 including tax and shipping).
I highly recommend this tool for any Do-It-Yourself (DIY) sight installation on these M&P's. The dovetails are extremly tight!!!