Colt Trooper MK III, .357 mag. cal. double action revolver. Serial #31998L, mfg. 1978. Excellent condition. 4" ribbed barrel has an excellent bore. 99% blue. Only evidence of wear is a slight cylinder ring. Adjustable rear sights. One pin front sight blade. Colt gold monogrammed checkered walnut target grips are excellent. Outstanding Trooper in the conventional 4" barrel length. Gunrunner West item.