I suppose you're looking for the sidewinder.
2 seconds sound clip from the Flaming Feather (1952) movie soundboard.
You can hear this line at 00:23:20.840 in the DVD version of the movie.
Quote context
[...]
- I don't need no escort, Lieutenant. I ain't going no place.
- Well, aboard. We'll try and get you there.
- Hold it! Grab another passenger.
- Morning.
- Howdy.
- My name is McCloud from Canyon Diablo.
- Yeah, I heard all about you. That's too bad.
- I suppose you're looking for the sidewinder.
- Got any ideas where it'd be a good place to start?
- Me? I wouldn't even know where to start looking. Neither would nobody else.
- What do you know about an hombre called Showdown Calhoun?
- Just a tin horn gambler, gunfighter, hangs out at the last chance. Why do you ask?
[...]