This is the somewhat rare civilian version of the Winchester Lee Straight Pull Rifle, caliber 6mm Lee Navy (.236 USN) approximately 1700 manufactured between 1897-1902. The U.S, Marine Corps was armed with the musket version of this rifle during the Spanish-American War and the Boxer Rebellion. It was superceded by the 1903 Springfield.

It is loaded with a special en bloc clip, which dropped out through the bottom of the single stack magazine when the last round was fired. The cartridge fired a 112 grain bullet at 2560 feet per second. Sporting ammunition was available until 1935.

The .220 Swift made use of a shortened and necked down version of this case.