Did the famed long-barrelled Colts exist?
Certainly - since the days when the Paterson was new.
Many, many fakes abound, and some were fitted with a very rare shoulder stock that's been reproduced, as well.
The problem is the tying of one of them with the lawmen that Buntline claimed to've given them to.
The survivors of the era - Earp and Masterson, notably - make no mention, and theirs were well-reported lives lasting well into the twentieth century.
Stuart Lake was known to fabricate for publication, though he was no match for Buntline, whose purple prose romanticized and mythologized the fading days of the frontier so thoroughly that some folks still take their work seriously.
Research and Provenance are key - can't get the one without doing a lot of the other...
Vaya,
Scouts Out!