I was in the service from 1973-1976.I saw a movie in a theatre during that period about a martial arts school that was attacked by a rival school and almost e1 was killed.a survivor was left with only one arm.he escaped and went to learn from a master the iron fist technique.he kept punching his fist into hot coals until his hand became a deadly weapon and then went out to exact revenge on the ones who killed his master.does anyone have any knowledge about this movie?

One Armed Boxer (http://en.wikipedia.org/wiki/One_Armed_Boxer)