The revolver features a heavy barrel and free wheel loading system (cylinder rotates in either direction). The solid walled cylinder is chambered in Linebaugh's own .500 Linebaugh cartridge, one of the most powerful handgun calibers. This big bore caliber is the preferred carry of the company's owner John Linebaugh. Linebaugh serial number "1094" on bottom of the barrel and the back of the cylinder. Includes a Ruger hard case (modifications made to the interior walls to fit the gun) numbered to a different gun.