Here's my experience with the Glockmeister sight tool: 1st use: Meprolights; the sights went on fine, but the tool started to break. The part that actually contacts the sights came disconnected from the screw that pushes it on one side. No big deal because it could still push. 2nd use: Heinie night sights; was barely able to get the sights half way onto the slide when one side of the pusher completely locked up and began to bend, and eventually the entire tool came apart. I now have a carry gun that I can't carry until my MGW tool arrives. Tapping with a punch isn't going to cut it this time. I would definitely recommend against purchasing this tool, based on my experience. I've read good things about the mgw tool and look forward to getting some sights back on my glock.