Made a rear sight yesterday from whats left of an old RR spike. This is sort of a small Lehigh style sight with a vertical center section in the middle. This method provides plenty of exercise and requires soem elbow grease. I did this in about an hour.
First drilled a hole in the top and then ground it out smooth.
next made 2 vertical cuts one of them bisecting the hole
next made 2 horizontal cuts to relieve the raised bar
after measuring twice I cut the base to size. Also filing in some decorative grooves on each side.
turning the spike horizontal I then cut off the sight
and finally after some filing and polishing its ready to be installed