Ruger Blackhawks feature Rugers patented transfer bar ignition system with loading gate interlock and reverse indexing pawl, together with an all coil spring mechanism, adjustable sights, and frame mounted firing grip. Factor in the Ruger reliability and they are the best value on the market. Blackhawk XL Revolver has interchangeable cylinder, .38 Special and .357, to 9mm or from .45 Colt to .45 Auto.