Colt Anaconda Revolver (Also known as .44 Magnum) Introduced in 1990, the Colt Anaconda is a large frame double-action revolver featuring a full length under-barrel ejection-rod lug and six round cylinder, designed and produced by the Colt's Manufacturing Company. Chambered for the powerful .44 Magnum and .45 Colt centerfire ammunition cartridges, the Anaconda marked the Hartford, Connecticut firm’s first foray into the popular large-bore Magnum pistol market.