This is a Colt Trooper Mark III double action revolver chambered in the .357 Magnum caliber. The pistol features a case hardened serrated hammer and a blue'd 4" barrel, frame and six shot cylinder with solid walnut hardwood checkered grip inlaid with Colt medallions each side. The barrel is marked "Trooper MK III .357 Magnum CTG" and "Colt's Pt. F.A. Mfg. Co. Hartford, Conn. U.S.A.". Known for its reliability and knockdown power, the Colt Trooper was widely used by law enforcement professionals. The revolver is in good condition. Serial number is 24455L manufactured in 1978. This is a modern firearm and requires a FFL transfer or NICS background check.