The Winchester Model 1912 (also known as Model 12, or M12) is an internal-hammer pump actionshotgun with an external 6-round tube magazine. Popularly named the Perfect Repeater at its introduction. The United States military used various versions of the Model 12 in World War I, World War II, Korean War, and in the early part of the Vietnam War.
It was the next step from the Winchester Model 1897 hammer-fired shotgun. The Model 1912 was designed by engineer T.C. Johnson, and was based in part on the M1893/97 design by John Browning, in that it used a sliding forearm (pump action) to cycle the mechanism. The weapon was a very successful internal hammer pump-action shotgun.
