Hugh O'Brian, in The Legend of Wyatt Earp, carried a Buntline Special Colt Peacemaker, which had a 12-inch barrel. Ned Buntline, a writer of bogus western thrillers, supposedly had five of these revolvers built to order and presented them to prominent Western lawmen. In reality, the Buntline Special was the invention of writer Stuart Lake, who dreamed it up for his fraudulent 1931 biography of Earp. In the TV series, Earp used the long barrel to whack bad guys upside the head. In real life, O'Brian had been a Marine Corps DI, and was probably pretty good at whacking people upside the head.