Backup Tactical Mag Extensions for Glock 19/23 - Style Meets Performance Enhance your Glock 19/23 with Backup Tactical's precision-machined magazine extensions. Built from rugged aluminum and finished with a bold 'frag' pattern, these extensions deliver improved handling and a unique custom look. Each extension comes with a performance spring and securing pin for easy, reliable installation. Upgrade your firearm with the perfect blend of function and style.