Looking for a film based on vague memories

I was hoping to find the name of a film that featured a main character with his gun holstered on his shoulder or upper arm. I thought it was Gentleman Killer for some reason but that is probably not it. I seem to remember the shoulder holster on one of these typically suave heroes who utilizes gimmicks to get his revenge or bring in the killers.

1979 Bloody Marlene “El Brazo De Oro”

They Call Me Halleluja

Great knowledge guys… My memory is so foggy on this it could be either of those films but I’m convinced that this main character did not have any other gimmicks. Just the holster on his upper arm.

‘looking for a film based on vague memories’