http://www.patreon.com/ForgottenWeapons The Cochran turret revolver is one of the more common turret revolvers in the US, although that's a pretty low bar, as only about 150 of them were made. Turret-sytle revolvers never became popular on the commercial market because of the potential hazards posed by a chainfire when one has chambers pointing in all directions - including back at the shooter.