I just recently got a different trigger for my impulse and and trying to get it installed in my Adrenaline Impulse frame.  Problem is, I can't get the old trigger out.  I removed the two side screws that prevent lateral movement and from what I can tell the only thing holding the trigger in is a pin.  Is the only thing you need to do is knock the pin out to remove the trigger?  I can't seem to get the pin to budge and I don't want to try and force it.  Is there something I'm missing or trick I need to use?

Any help is greatly appreciated.