If you haven't seen this 1972 film -- perhaps Charles Bronson's best -- you're missing out.
Directed by Michael Winner (Death Wish, The Sentinel).
The music -- effective, edgy, dissonant while avoiding gimmickry -- was by Jerry Fielding, whose scores for 'The Outlaw Josey Wales', 'Straw Dogs', and 'The Wild Bunch' were nominated for Academy Awards.
Here's the (compressed) opening scene which is known for having no dialogue despite running 16 minutes. It's also one of the reasons I fell in love with movies.
Today, movies have much more polish visually, but rarely hook the audience this well.