Close copy of the military tool to set the front sight height and windage on the M240 machine gun. A buddy is a trainer for foreign troops. On the firing line the FS Adjustment tools occasionally get picked up by the trainees as they are policing the brass, and scrapped. He’s had a heck of a time finding a commercial source to replace them. So he asked me to make a reproduction, and while I was at it, I made a few more to justify the setup time on the machines, and hopefully to break even in the process.