Death Rage (1976)

A retired hit-man decides to take one last job to avenge the murder of his brother by a mafia gang. An eager would-be mobster helps him.

Director:

 Antonio Margheriti (as Anthony M. Dawson)

Writers:

 Guy Castaldo (screenplay), Luciano Vittori (titles)

Stars:

 Yul Brynner, Massimo Ranieri, Barbara Bouchet - via IMDB 

https://archive.org/details/DeathRage