Cimarron's Thunderer — a Bird's Head grip SAA in 45 Colt with a 3.5-inch barrel. The compact dimensions and Bird's Head grip make this an ideal combination for SASS's Classic Cowboy category. Doc Holliday's preferred configuration according to some historians. Type: Revolver Action: Single-Action Caliber: 45 Colt Capacity: 6 Year introduced: 2000, Italy Weight: 34 oz Overall length: 9" Status: Active Intended use: Cowboy Action, Collector