Who invented the first successful hammerless double Barrel shotgun?

The first successful hammerless double-barrel shotgun was invented by the English gunmaker Joseph Lang in the late 19th century. He introduced this design in 1875, which featured a mechanism that eliminated the external hammers found in traditional shotguns. This innovation allowed for a more streamlined and safer firearm, leading to its widespread adoption. Subsequent improvements and variations were made by other manufacturers, but Lang's design was pivotal in the evolution of shotguns.