Sight swap M&P 9

[Bushbasher]

I got the Trijicon HD sights fir my M&P 9mm I got my rear sights swapped out but I can’t get my sight pusher into a good enough position to grab the front sight and push it out
What’s the best way to change it out? Using a punch?

 

[AB_blaster]

Brass or delrin punch.

 

[Bushbasher]

Thanks