Viaggio Nella Prateria by Stelvio Cipriani – some time ago it was the soundtrack to one western. And now it is used in the movie "The Man from U.N.C.L.E.", which also has shooting stuff. The theme is the same – a western. Music is instrumental, but it is pretty self-sufficient without a voice. The overall duration of 3:07. A beautiful melody, under which you can dance easy tango or kill a couple of foes, which you keep at gunpoint of sight.
Reference:Stelvio Cipriani Discography at Discogs