stripper clip

Hey everyone, I have a polytech m14s that I am in the process of scoping. I need to take off the stripper clip guide, but it does not want to come off. I am using a 3/32 punch and hammering from underneath the receiver but the roll pin won't come out. What am I doing wrong? Advice would be...

while trying to remove the stripper clip my 3/32 punch broke off in the hole. The pin was pushed out a little but now i cant even slide the clip out because either the pin is not out enough or my broken punch is in the way. any suggestions?