This is a new Taylors & Company/Uberti 1873 Gunfighter Defender (555170DE) single action revolver chambered for .45 Long Colt. This gorgeous pistol features a blued finish, case hardened frame, and 5.5" barrel. It includes a box, lock and softcase.

From Taylors:

The Gunfighter Defender is a perfect combination of the original Gunfighter features and the favorite lowered Runnin' Iron® hammer. Taylor's installed the favorite 1860 Army grip onto the new model frame cattleman to accommodate the larger hand shooter. The Army grip is longer and slightly wider than the smaller Navy grip that is usually found on 1873 single action models. This checkered model features a case hardened forged steel frame, blued steel parts, lowered hammer spur, and a checkered Army Size walnut grip. The Taylor Tuned Gunfighter Defender comes ready to shoot out of the box featuring a hand polished action and our custom springs.