Rome, Armed to the Teeth
Roma a mano armata (original)
A tough, violent cop who doesn't mind bending the law goes after a machine-gun-carrying, hunchbacked psychotic killer.
Starring Maurizio Merli, Arthur Kennedy, Tomas Milian, Maria Rosaria Omaggio, Giampiero Albertini, Ivan Rassimov, Biagio Pelligra, Aldo Barberito, Stefano Patrizi, Luciano Pigozzi
It's a action & adventure and crime movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United Kingdom.