Steve McQueen Mares Leg sawed-off Winchester on Wanted Dead or Alive.
Theres an interesting back story about that gun. It was an illegal SBR and some folks at the BATF noticed.
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Interesting!
Man From UNCLE gun ran into a similar problem because the gun could supposedly fire full auto.
“This capability brought authorities to the set to investigate reports that the studio was illegally manufacturing machine guns. They threatened to confiscate the prop guns and it took a tour of the prop room to convince them that these were actually ‘dummy’ pistols incapable of firing live ammunition, and had to be convinced that it was not a real gun at all but just a prop.”
(Wikipedia “Man From UNCLE”)