I picked up a Shield in 9mm a couple weeks ago. I just got in my TruGlo TFO sights. I have tried using a brass punch on my rear sight (removed the set screw, pushing it toward the ejection port) but, it won't budge. The rear sight was not centered from the factory, slightly offset to the right, which leads me to believe the rear sight was improperly sized and therefore installed improperly. Does anyone in the Portland area have a sight pusher?