The Adams MkIII revolver was the first truly modern sidearm issued to the North-West Mounted Police (NWMP) in late 1874, replacing unreliable converted cap-and-ball models. Developed by John Adams based on his brother Robert's earlier designs, this centerfire revolver featured a solid frame and double-action trigger. Despite its advanced design for the era, its service life was short, making original NWMP-marked MkIIIs scarce today.
The Winchester Model 1876 was developed to address the limitations of the Model 1873, particularly its inability to reliably handle powerful, longer rifle cartridges like the .45-70 Government. Winchester scaled up the 1873 action and introduced the .45-75 cartridge to accommodate these needs. While successful and used by notable figures and law enforcement, its production was relatively short-lived due to the superior Model 1886.
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