Works great. - XTech Tactical Hellcat 9mm 0 for 10 Round Grip Extension for Springfield Mag

A little tricky to install, but easy if that makes sense. I guarantee most bad reviews will be from people who couldn’t figure it out. Use a small flat object to push the mag spring down as you slide the extension onto the mag. That’s how you get the spring to fit over the tab and seat correctly. Shot 100 rounds immediately after install work no issues.