"Rosco" (in "Dukes of Hazard") from cant "rosco" (pistol)?

[Gerald Cohen]

This is to both ans-l and ads-l:

    The 1980s TV show Dukes of Hazard included a perpetually bumbling
sheriff's deputy named Rosco P. Coltrane. I've recently noticed that "rosco(e)"
was (perhaps still is) a cant term meaning "pistol, revolver."

    Might this cant "rosco(e)" perhaps lie behind the name Rosco in the TV show?
There's of course also "Colt" in his last name "Coltrane."

Gerald Cohen