Just curious. Why remove it? I have or had many HK pistols with the lock (including a USP Tactical .45AA). They came unlocked, I checked to be certain they were unlocked before racking the slide for the first time, and I simply put the key away! I don't even remember the lock is there until I read a post about it. They don't come loose and lock up like the S&W internal locks. They don't really do anything but sit there. Just my thinking. Others may differ.